Rift - Fan Site

Rift MMO - Discussions + Guides.

Search

 

Pages

Crash to Desktop every 20-40 min

10:04 pm, March 10, 2018 Rift Prime - Vigil server Posted here as well in Prime Bug Reports Thread I am getting a crash to desktop about every 20-40 min. The time frame is so wide because it is not the same time each crash. [..] View

Strange Scaling/Lines on rotation

12:04 pm, March 6, 2018 So to put this in perspective. I have always used my same Laptop to play Rift on and off for a few years now. I even played last expansion release without issue. The only thing I can think that MIGH [..] View

There was a problem preparing the report (error #2001:0521).

12:04 pm, December 26, 2017 Trying to return to the game. I get this error every single time I try to click play. I click Rift Play button. It goes through the verify or update function. IMMEDIATELY throws up the Rift Erro [..] View

GEFORCE Experience

10:04 pm, November 10, 2017 For some odd reason GeForce experience removed rift from my game catalog. Even when I add the file path C:\Program Files (x86)\Glyph\Games\RIFT\Live GEforce cant detect it. My drivers are all up to [..] View

Strange graphical issue

1:04 pm, September 26, 2017 So, I've been having this strange graphical bug and I can't seem to fix it no matter what I do. I play with all settings maxed out. I have also checked my Nvidia control panel and made sure there were [..] View

Object draw distance. Bug or intended?

1:04 pm, September 22, 2017 So, I have all in game settings maxed out but objects like trees, enemies, rocks, etc. pop up literally feet away sometimes. Is this a bug or intended? Is there a way, say, through the rift.cfg to tur [..] View

Rift is shutting down my PC

11:04 pm, August 12, 2017 after the small patch the other day rift has been shutting my PC down after i hit the play button, the splash screen will come up with the Rift logo and then go to a loading screen that appears before [..] View

Incredible Performance Loss

1:04 pm, May 6, 2017 Hi! So I have been playing Rift since launch and for as long as I can remember its been pretty sub-par performance with any PC I use. Unfortunately, with my recent return, its making the game unplay [..] View

Glyph stuck minimized. Tried everything under the troubleshooting section

11:04 pm, April 10, 2017 I've tried everything under the trouble shooting section. The glyph launcher is just staying minimized and I can't force it to maximize. I have even tried launching it through nvidia geforce experienc [..] View

Rift Crash - High-end PC

10:04 pm, January 28, 2017 Hi, My game crash after the character selectionhttp://img11.hostingpics.net/pics/321542okkkk.pngEvery drivers and software are up to date.Setup: • Motherboard: Asus ROG Maximus VIII Formula [..] View

Crashing by joining new IA's

12:04 pm, January 15, 2017 Hi. I use windows 10 64bit atm and system and game are updated. Every time i try to join new IA's (planar) my game crashing... No matter when and how much time i try my game keep crashing when i try t [..] View

Unplayable

10:04 pm, December 3, 2016 Just came back to rift and it is unplayable. Lag... stopping... hit button nothing happens for about 5 secs... even crafting, chatting etc... very sad... any ideas>\? Win 7 prem Intel Cor i7 [..] View

Spell effects disappear on better machine

1:04 pm, October 15, 2016 I have 2 PC's on the same network: PC 1 i7-2600 CPU @ 3.40 GHz 8 Gig Ram 64bit OS Geforce 780 PC 2 i7-4770 CPU @ 3.50 GHz 16 Gig Ram 64bit OS Geforce 970 Both ingame settings set to MAX. P [..] View

Snedhepl: PTS client crashes when connecting to game server

1:04 pm, October 8, 2016 Quote: Originally Posted by Snedhepl Thanks for the report. It currently seems like something is causing Rift64 and Windows 10 to disagree. Quote: Original [..] View

Reduced Effects on better PC

1:04 pm, October 1, 2016 I have 2 PC's and access to 2 accounts. The older PC has a Geforce 780 and 8 gig of memory, the new one has a Geforce 970 with 16 gig of memory and a fast processor. Both have the settings set to ma [..] View

No sound after last patch (8/17)

11:04 pm, August 29, 2016 I have no audio from Rift (99% of the time). The Intro movie plays with audio but the game itself does not (from character creation screen to actual gameplay). Occasionally I get audio back during d [..] View

Screen flickers when I use SLI

1:04 pm, August 20, 2016 Hi, I have an Alienware 18 with GeForce GTX 780M and have SLI option. If I enable SLI, and in the game options, selected Shadows even to low, the shadows in game flicker constantly. When I disable t [..] View

RIFT crashing when Multicore enabled

1:04 pm, June 24, 2016 I am running on a powerful rig which should be able to handle Multicore support just fine. - ASUS Z170 Deluxe motherboard - 32GB of RAM - Intel 6700k processor - EVGA nVidia GeForce 1070 SuperCloc [..] View

Crashing Issues Update

11:04 pm, June 22, 2016 Since my other thread was closed for some reason, I'll post an update in case something in here might help someone else. Since installing the latest GTX 970 driver (it came out roughly 2 weeks ago, m [..] View

FPS and GPU utilization in Margle Palace

1:04 pm, June 4, 2016 Hey So I have been playing around a bit with the multicore renderer, just to see how it performs, if it actually can make use of multiple cores and if the claimed FPS increase was noticeable. For the [..] View

Glyph Downloader and Windows Firewall Issue

1:04 pm, April 29, 2016 I use a program called Windows Firewall Control to handle all my Windows Firewall needs. Thus far, it has handled all applications perfectly except for 1. The Glyph Downloader is a problem for me, [..] View

Improving Rift Online ( Vista, XP,2000,Win7, Win8, and Win10)

1:04 pm, April 21, 2016 Hi, my name is Jason, a Senior Field Service Technician at Field Nation. I've been fixing computers and teaching others how to do so for over 16 years. I'm making the ultimate gaming guide to help oth [..] View

Black Screen While Playing Rift

10:04 pm, February 9, 2016 Hello all, I’m writing about an issue I’m having with Rift that I’m not sure the origin of. Just over a year ago (December 2014) I custom built two computers that are ne [..] View

Auto Detect - Entering power safe mode

10:04 pm, January 21, 2016 My PC crashes while playing Rift, and it doesn't do this at any other time. Crash details: This message appears on the screen: Auto Detect - Entering power safe mode. The screen goes black, and the on [..] View

Constant Bluescreens/lockups and have to reboot multiple times

12:04 pm, January 11, 2016 as stated above. my screen either goes turquoise and I can't window key out have to reboot, or my screen goes black have to reboot. This happens after 5 minutes of the start playing to an hour or long [..] View

Technical issues

12:04 pm, January 6, 2016 So I have submitted various reports through the automated process in Rift. I have followed numerous guides / suggestions. I run every game at Ultra / extreme and/or highest settings. I have an AMD [..] View

Minimap background color

10:04 pm, December 17, 2015 Hi, Since recently, I have the minimap background color seems to be more green/yellow. Visible in snowfield lands (as Tarken) :Attachment 26885 In the map, the snow is well white but in the minimap, [..] View

Raid fps issue

10:04 pm, December 11, 2015 Hey guys, lets talk about your pc-specification and your fps in MoM. For me it makes even less fun... Currently I the following fps: Pagura= average: 15-18 fps / min: 12 fps / max: 22 fps Arak= a [..] View

Greenscale Infiltrator Johlen crash

10:04 pm, November 29, 2015 I have tried to solo Greenscale's Blight on a number of my characters. Each time when I have Infiltrator Johlen down to about 1/4 of his health my computer crashes. It doesn't crash to desktop, the co [..] View

PC tower advice

10:04 pm, November 28, 2015 Hello, I currently have an over 6 years old pc (intel core 2 quad cpu 2.5GHz, 4Go RAM and a Nvidia Geforce GT120 for a 20" screen). I m around 15-20 fps in normal content, but i go down to 5-7 fp [..] View

Strange Graphical Lock/Crash/Thing from RIFT

1:04 pm, October 19, 2015 Hey guys, I've been having these weird graphical locks when I play rift where my monitor will only display a screen full of... 1 color, usually something dark, like a grey or brown. When this happens [..] View

Rift and Nvidia Geforce Experience optimal settings

11:04 pm, September 30, 2015 Hoi landlubbers! I just came back from a year and a half (ish) break from Rift. And I had forgotten how much this game FPS lagged even tho im on a pretty ok computer hehe. Before I used Geforce Expe [..] View

Cannot start game

11:04 pm, September 3, 2015 Ok, simple and short as possible. Wanted to try Rift, so downloaded glyph, installed. Then installed Rift. Game crashes on load screen and it asks me if I want to send an error report or not. This [..] View

HELP! Game Crashing to Desktop VERY OFTEN 3-5 minutes or less

1:04 pm, August 22, 2015 Hi everyone - I think this might be a DIFFICULT tech issue to solve. I have spent the last week trying to find solutions but still nothing seems to be working.ISSUE: Game crashes to desktop every 2-5 [..] View

Machine_Check_Exception

1:04 pm, August 13, 2015 To whom concerned, Recently Rift has been freezing up on me causing me to have to restart my PC. I carried my computer to get it cleaned and checked out, and the PC technician told me that all my har [..] View

graphics problem (texture)

11:04 pm, August 10, 2015 https://youtu.be/YHxHYSY51-0 Video driver: Updated Direct X: Updated Windows: Updated Reinstalling the game: Updated No effect! Textures still low resolution! Help me please!!!! ---------------- [..] View

Video Card Purchasing Advice, please

1:04 pm, July 30, 2015 I'm looking to replace my current video card (560 GTX Ti) with a mid- to high-mid-end card. I spend most of my gaming time on Rift, so I'm looking to optimize for that. I generally run with two monito [..] View

Low FPS Raiding

11:04 pm, July 27, 2015 Hi all, I am wondering if there is something I am missing when it comes to fps and raiding. This has been a persistent problem for me, but no one has really been able to give me a good answer as to [..] View

0 FPS After patch 07.23

11:04 pm, July 23, 2015 Was playing fine right before the patch, when Trion was saying "3 minutes server will go down for update....etc.." Then I logged in again after patch and I'm having 0~1 FPS, even on characte [..] View

Low FPS on a good computer

11:04 pm, July 20, 2015 hi i read this article and followed its stepshttp://forums.riftgame.com/technical...ps-issues.html but i still have low FPS, i play on lowest quality and i get around 20-25fps i change it to high and [..] View

Sudden low fps mid game

11:04 pm, July 9, 2015 so i downloaded rift from steam today and i was getting 20-30 fps my first hour. then i restarted my pc and got 30-40 fps on ultra settings but while i was playing 15 min later all of a sudden it sta [..] View

Nvidia release Kepler 'bug' fic drivers

1:04 pm, June 1, 2015 Now these drivers seem to specifically only apply to games like The Witcher 3: Wild Hunt, Far Cry 4 and Project Cars, it seems people using GTX 600 and 700 series Kepler GPU's were experiencing lower [..] View

The game is frozing for 1-2 seconds if I press for example "c" for my character

11:04 pm, May 23, 2015 The game is frozing for 1-2 seconds if I press for example "c" for my character. What reason could it be? Playing on gamer laptop: Acer Gaming Notebook Intel Core i7-4720 HQ 2,6 GHz NVidia G [..] View

Computer advice needed

1:04 pm, May 19, 2015 I'm upgrading to a new laptop computer and need some advice if Rift will be playable in either of the 2 systems that I am down to in the selection process. System 1- HP Envy 17.3" Touchscreen L [..] View

Played once for 4 hours today at work went home and now crash everytime i press play

11:04 pm, May 17, 2015 Complete run down as follows Downloaded via steam played for a couple hours then exited the game. Tried to play a little later glyph opens fine i press play black screen comes up then i get error and [..] View

Glyph client works, Rift crashes at black screen after pushing play

1:04 pm, May 7, 2015 All, I need help with this, please. I haven't played long, but I had no problem running Rift on my system--until the April 22 patch. Since then, I can log into the glyph client (even with the Rift A [..] View

FPS dive seemingly random

11:04 pm, May 6, 2015 Hi everyone ! At first I'll give you my apologizes if it happens that this particular problem has already been solved somewhere. I searched for it, looked at the titles of the 2 first pages of topics, [..] View

Very frustrated. New Build and its running worse than my Old PC

11:04 pm, April 25, 2015 Recently built a new machine and it is running Rift worse than my old machine. I especially notice it in 2 places: 1) In open world NMR's if there are lots or people around. 2) In CQ with lots of p [..] View

Snedhepl: No more WinXP Support for 3.2 ?

11:04 pm, April 9, 2015 Quote: Originally Posted by Snedhepl This is definitely a bug, and we're looking into it. Quote: Originally Posted by R3db4ss Since a few upd [..] View

Rift freezes loading screen

1:04 pm, April 7, 2015 Hey guys, so i just downloaded and insttalled rift on the new computer i just purchased and whenever i press play it will freeze at the loading screen, I cant even see the loading, all i see is a blac [..] View

Help with computer issues

12:04 pm, March 25, 2015 So i've been doing like 3 fps in raids for awhile now and I cant figure out why this is my computer I havehttp://www.newegg.com/Product/Produc...82E16883220445 with my Graphics card http://www.gefor [..] View

Graphic glitches...again

12:04 pm, March 9, 2015 I have been having all kinds of graphic glitches today and just a few moments ago got dumped from the game without warning. No pop up error report, nothing. I was in the middle of a NMR at Ghar Stat [..] View

RIFT does not use GPU at all

12:04 pm, March 6, 2015 I'm using a GeForce 840M and my laptop refuses to use the GPU and uses the integrated graphics instead even though in the nVidia control panel it was specified that glyph and rift.exe has to use the G [..] View

"Ghosting" effects on mobs and PCs where there should be glowing aura effects...

12:04 pm, February 19, 2015 Any idea why sometimes I get these odd pure-white outlines on mobs and PCs in place of glowing effects? The only remedy I can find is to use the low-quality renderer, then it doesn't happen. e.g. a [..] View

Micro stuttering with a single GPU

10:04 pm, February 18, 2015 This is a problem I've had for years now, only recently did I discover what it was called, I spent hours trying to find a solution for it, trying everything I found and nothing worked. Here's a sample [..] View

RIFT Crashing

12:04 pm, February 18, 2015 Greeting, as of recently I've been having severe client crashes both in the game and in the character login screen. I've both repaired my client and re-installed the game entirely and the problem cont [..] View

My fps woes!

10:04 pm, February 14, 2015 So i'm running this game on ultra settings, and I get about 30fps now, but when I 1st downloaded this game onto my new rig, and playing on ultra setting I was getting like 70-90fps, I did delete the [..] View

Computer bottleneck?

12:04 pm, February 7, 2015 I constantly have around 14-25 fps while playing rift in low population areas. In other games as CS:GO i have a constant of 150 fps, while in battlefield 3 full settings i have around 90 fps. I have [..] View

GM Fasti: #Error 3300 Patching Error

10:04 pm, February 5, 2015 Quote: Originally Posted by GM Fasti Quote: Originally Posted by angelsilk I started having a 3300 error with rift on my Toshiba computer, g [..] View

Inability to get close to East side of Moonshade Higlands and Silverwood

12:04 pm, February 3, 2015 Since 1/28 3.1 update, my toons are having trouble reaching or being in Sanctum (the Guardians anyways), the east side of Silverwood and the east side of Moonshade Highlands (at least close to Three S [..] View

Terrain

12:04 pm, February 1, 2015 Hello, I hope some one can help me out. I have recently updated my grahics card to the Nvidia Geforce 760 gtx. Since the new update on Rift I can see lines and squares (Skeleton of the Terrain) on [..] View

Graphics crashes when looking at instance/dungeon portals

12:04 pm, January 20, 2015 While I cannot speak for everyone in this regard, I have (and maybe many others have as well) been dealing with graphics issues which cause the game's screen to lock up when looking at the portals to [..] View

Rift crash, need help !!! Black Screen !

12:04 pm, January 19, 2015 Hello guys, From 4-5 days i'm trying to fix my RIFT. I already checked whole forum and i still can't fix it. My problem is When i hit Play button i get black screen and mouse pointer loading. That's [..] View

Rift Frequently Crashes

12:04 pm, January 17, 2015 Rift frequently crashes and nothing I do seems to fix it. When it crashes, it goes straight to desktop saying rift has encountered a problem and asks to send an error report. I would be great if I cou [..] View

Rift Immediately crashing on Start up

10:04 pm, January 3, 2015 Everytime I click play on the Rift Steam version, an error message pops up n my face. "Rift has encountered an error" It either lets me exit or send an error report. I've been trying to solv [..] View

Intermittent freezes while moving around in Draumheim?

10:04 pm, December 27, 2014 I'm having frame rate problems from what seems to be mainly in water areas within Draumheim. (Though it does happen outside of the water areas in Draumheim, just not as often) While I'm moving around, [..] View

Quest: Roll the bones - Can't see colors to match

10:04 pm, December 22, 2014 OMFG! This quest has been bugged since day one. When you get to the anvil and are asked to "match the color", there's nothing to match. I've tried every graphics preset, still see nothin [..] View

Heeeeeeeeelp says me please.

10:04 pm, December 20, 2014 I have an issue where rift crashes now and then but remains memory resident until I restart the PC. Now I have checked my drivers are all up to date. Machine spec is as follows SYSTEM INFORMATION [..] View

Help Newbie with Computer upgrade

10:04 pm, December 17, 2014 I am not a tech guy at all. I currently have: Pentium Dual Core E5800 @ 3.2 GHz 8 GB Ram Nvida Geforce GTS 450 Gigabyte G41MT-S2P Motherboard Windows 7 64bit It's kinda old...I know. I need to save m [..] View

Rift and GeForce Experience

10:04 pm, November 10, 2014 It used to work, but lately, I just can't seem to get GeForce Experience from nVidia to detect that Rift is installed ... especially since Rift has gone over to Gyph. Anyone got any ideas on what path [..] View

Screen turns off when logging into the game - "No Signal"

10:04 pm, November 2, 2014 Hi, i have a problem: when i start the game, the screen rapidly turns on and off while loading the character selection screen. Often it ends up turned off, i get the "No HDMI signal" mes [..] View

Rift loads to a certain screen and freezes ?

12:04 pm, October 29, 2014 Hello, I spent the last few hours of my life installing this game, and patching it, just for it to get to this screen and not do anything. Before i continue my rant here is my specs, Intel i7-4810M [..] View

Serious Framerate issues

10:04 pm, October 27, 2014 my system has pretty good specs especially for a game like this Processor Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz Video Card 1 NVIDIA GeForce GTX 660 Video Card 2 Intel(R) HD Graphics 4000 Memory [..] View

Glyph client high CPU load

10:04 pm, October 26, 2014 I've noticed the other day that the Glyph client creates an unreasonably high CPU load. In the Windows Task-Manager it shows continuously at almost 50% CPU time, which would mean it pretty much exclus [..] View

Rift 3.0 still crashing on Mac using Emulators

10:04 pm, October 26, 2014 I was able to run 3.0 successfully for a few hours on release. Ever since they released hotfix #1, my client has failed to load. I usually get stuck on 14% and 22%, very few times the character scre [..] View

Regular irregular crashes to desktop

11:04 pm, October 24, 2014 Hey, it's starting to annoy that I get CTD every now and then. I'm just baffled. :rolleyes2: DxDiag dump: Spoiler! ------------------ System Information ------------------ Time of this rep [..] View

Rift game is not using my Nvidia custom settings (redux)

11:04 pm, October 24, 2014 After reading a number of posts on this subject here in the forums (eg., http://forums.riftgame.com/technical...-settings.html) as well as on the geforce forums (eg., https://forums.geforce.com/defaul [..] View

can't play rift (direct 3d initialization error)

1:04 pm, October 18, 2014 As title says, I cannot play Rift, I've tried multiple resolutions and still it doesn't work. I went onto the microsoft website to get the latest version of Direct x and it didn't change anything. I j [..] View

unusual graphical error?

1:04 pm, October 4, 2014 Specs: windows 8.1 (no choice in the matter) 12gb ram GeForce GT 720 1gb drivers are all up to date Problem: Log in and run Rift = beautiful background with no character, menu, nothing. Great so [..] View

Error when game is starting up.

1:04 pm, September 24, 2014 OK, I just installed this game 6hrs ago. While it was still downloading/installing, I began playing and played for 2-3hrs without any problems. I then exited and went to do other things. I never tu [..] View

New Nvidia 344.11 WHQL Driver released.

1:04 pm, September 19, 2014 It's very unusual for Nvidia to release drivers on a Friday but as they launched their new 9** series graphics cards yesterday, here you go. :alien: These are so new full release notes aren't even o [..] View

Insufficient Video Card - GTX 690

11:04 pm, August 23, 2014 Hi all I am hoping to get some help, whenever I try and launch Rift through the Glyph launcher it black screens right away with the error 'Insufficient video card' I have a solid system, will be pos [..] View

PLEASE HELP - Rift not launching

11:04 pm, August 20, 2014 Can anyone help with this? i installed RIFT today (through steam), i clicked play, and waited. nothing happened. no launcher, no error reports, nothing. i go into task manager, and the launcher appear [..] View

Problems with video

11:04 pm, August 13, 2014 Hi. So I'm experiencing this weird problem with video. Sometimes after logging in the game everything's okay, but sometimes everything is kind of messed up(relogging doesn't help, most likely only co [..] View

Glyph client is Freezing on downloading update

1:04 pm, August 8, 2014 Hello. I was able to play Rift normally untill the day when update has to be downloaded. So i normally started Glyph client and pressed Update on the Rift game. Download is going normally when it come [..] View

Consistent Crashing after hitting "Play"

1:04 pm, August 4, 2014 Hi, After the last patch, the game consistently crashes after hitting "Play" in Glyph.Exactly what happens:Click "Play" on Glyph Rift splash screen comes up, sometimes it gets to [..] View

Frequent Crashes

1:04 pm, August 2, 2014 Hello, I recently came back to Rift about 2 weeks ago. Since starting to play again, I have been having a serious issue with the game crashing to the desktop. It started as a once in a while thing, b [..] View

Performance Problems after Format C:

11:04 pm, July 29, 2014 Hello Guys, first of all i want to say my english isnt that well, so sorry for that. My problem is that i have hard FPS drops when i play rift. I have around 9 fps when im in T2 GA 10 mann raid and [..] View

New Nvidia 340.52 WHQL Drivers out

11:04 pm, July 29, 2014 Time for a new Driver package for your Nvidia card, this one rolls out version 340.52 in case you're not a fan of Betas :biggrin2: Quote: GeForce 340.52 WHQL introduces the followin [..] View

Direct3D Initialization Error in Fullscreen

11:04 pm, July 26, 2014 So I got a new monitor this week and went from 1920x1080 to 3840x2610. If I run the game in windowed or fullscreen windowed modes, everything is fine. If I switch to fullscreen, the game locks up if [..] View

Graphics Problems

1:04 pm, July 21, 2014 For the past weeks i have been having some odd glitches happening in-game, some are constant and others just appear randomly. The one that is most troubling would be the water glitch. Anytime i go und [..] View

Super long boot

11:04 pm, July 14, 2014 Hey all, I've been having issues with my PC PC Spec Operating System Microsoft Windows 7 Home Premium 64-bit SP1 CPU AMD Phenom II X4 955 3.2GHZ RAM 8.00GB Dual-Channel DDR3 @ 668MHz Motherbo [..] View

Grey plant textures and vfx disappearing

1:04 pm, July 12, 2014 So I've been playing this game for several months now and have had 0 issues. But until recent patches I have had my weapon vfx disappear randomly as well as fire vfx and sometimes smoke effects as wel [..] View

Game freezes after Trion intro !!!

1:04 pm, July 11, 2014 I tried everything and I read everything on the forums that I could find on the similarity of this problem ... and I can't find the update KB285 something that helped a lot of people ... IVE BEEN TRYI [..] View

Performance Issues

11:04 pm, July 7, 2014 Hello, i just started playing Rift again, after a long break, but i find my performance during the game pretty terrible, even that i play on Low settings. Computer Specifications: Geforce GTX 560M [..] View

Severe rubberbanding issue

1:04 pm, July 1, 2014 Problem started Saturday evening, and has been present ever since. I rubberband severely whenever there's a lot going on, such as a boss pull. I have done the following to try and troubleshoot the pro [..] View

FPS rate drop the bottom? Need Advice

11:04 pm, June 27, 2014 I use an Geforce GTX460 for the game and since a few weeks the fps rate is somewhere arround 4 for the normal gameplay (normaly it´s between 15 - 25... View

Forums

Rift and GeForce Experience

Nov 28, 2014, 1:02 pm It used to work, but lately, I just can't seem to get GeForce Experience from nVidia to detect that Rift is installed ... especially since Rift has gone over to Gyph. Anyone got any ideas on what path[..] View

Sign In

×

Sign Up

×
Page generated in 0.5043 seconds.
Site Engine