# IPR Issues **URL:** \ **Category:** Issues\ **Created:** [July 19, 2017, 7:27pm UTC](https://forums.chaos.com/t/ipr-issues/83981 "2017-07-19T19:27:09Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![leehumphries](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@leehumphries](https://forums.chaos.com/u/leehumphries)\ **Post date:** [July 19, 2017, 7:27pm UTC](https://forums.chaos.com/t/ipr-issues/83981/1 "2017-07-19T19:27:09Z")
I have been having major issues with IPR for the last week. I was beginning to think it was my machine playing up since i have sent the 3ds max dump files to chaos regarding the issues im having and they cant replicate them. The scene im working on hasa clean reset file - its a few walls unwrapped with a displaced stone texture - using IPR was great as i could have immediate feedback on my tweaks but every so often it would just crash on me. Anyone wants to test to see - make a simple wall - add a fairly detailed stone texture (im using an arroway one) then try adjusting the output colour map in the displaced channel with IPR running. I just get a straight Max close. I am now using vray RT in cpu mode and everything i was trying to do works absolutely fine and not one crash. Are others having any issues with IPR running and crashes ---
**Author:** ![Deflaminis](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/deflaminis/32/22216_2.png) [@Deflaminis](https://forums.chaos.com/u/Deflaminis)\ **Post date:** [July 19, 2017, 8:59pm UTC](https://forums.chaos.com/t/ipr-issues/83981/2 "2017-07-19T20:59:36Z")
Do you get a CER report window? ---
**Author:** ![leehumphries](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@leehumphries](https://forums.chaos.com/u/leehumphries)\ **Post date:** [July 19, 2017, 9:05pm UTC](https://forums.chaos.com/t/ipr-issues/83981/3 "2017-07-19T21:05:39Z")
Unsure exactly what a CER report window is but max just drops out and crashes nothing else ---
**Author:** ![Deflaminis](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/deflaminis/32/22216_2.png) [@Deflaminis](https://forums.chaos.com/u/Deflaminis)\ **Post date:** [July 19, 2017, 9:59pm UTC](https://forums.chaos.com/t/ipr-issues/83981/4 "2017-07-19T21:59:25Z")
The CER window is a crash window which submits the crash data to Autodesk. Usually has detailed info on a crash. No biggie. ---
**Author:** ![nikolay.kusht](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/nikolay.kusht/32/8288_2.png) [@nikolay.kusht](https://forums.chaos.com/u/nikolay.kusht)\ **Post date:** [July 20, 2017, 2:11pm UTC](https://forums.chaos.com/t/ipr-issues/83981/5 "2017-07-20T14:11:48Z")
Does the issue occurs with older version of V-Ray? Have you tried resetting 3dsMax to default settings by deleting the ENU folder located “C:\Users\%username%\AppData\Local\Autodesk\3dsMax\2017 - 64bit\ENU”? ---
**Author:** ![leehumphries](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@leehumphries](https://forums.chaos.com/u/leehumphries)\ **Post date:** [July 20, 2017, 3:33pm UTC](https://forums.chaos.com/t/ipr-issues/83981/6 "2017-07-20T15:33:29Z")
I was using 3.6.01 while i had the issues. I have since updated to 3.6.02 and i did have similar issues. It isnt all the time, you can listerally have a good run for a few hours then all of a sudden you try something and it crashes. Going to keep testing and see if i still get crashes. I was always launching IPR through VFB. Will keep you updated on further tests ---
**Author:** ![leehumphries](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@leehumphries](https://forums.chaos.com/u/leehumphries)\ **Post date:** [July 20, 2017, 3:43pm UTC](https://forums.chaos.com/t/ipr-issues/83981/7 "2017-07-20T15:43:51Z")
Update - i have just had this error while running IPR from VFB. UNHANDLED EXCEPTION : calling frameEnd on render instances Last marker is at /src/globillmap.cpp.line 2357 : GlobIllumMap : buildLightMap0 (5) All i did wasapply a Forest gravel from their library to a simple piece of geometry. Any idea what the error is as ive had this before, i usually just restart and it works ok. Errors / crashes are very intermittent ---
**Author:** ![andy51](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/andy51/32/48556_2.png) [@andy51](https://forums.chaos.com/u/andy51)\ **Post date:** [July 20, 2017, 4:07pm UTC](https://forums.chaos.com/t/ipr-issues/83981/8 "2017-07-20T16:07:40Z")
I am very new to this. but I have been testing IPR for the last couple of days, playing with the lighting, trying out various camera angles, then I tried adding a forest object and crash, Max just closed without error… Could it have something to do with the fact that when you update something like a light or move the camera, IPR has to refresh everything, load all the textures objects etc etc. I’m sure this must be a memory thing, especially if you are adding new geometry… It’s insanely difficult to nail this one down and as you pointed out, you can go for hours in one session and then try it again later and it falls over in 10 minutes. It’s a very useful feature and in my situation preferable to RT, so would be great to see it made a lot more stable in the future. I am using Vray 3.60.02 ---
**Author:** ![leehumphries](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@leehumphries](https://forums.chaos.com/u/leehumphries)\ **Post date:** [July 20, 2017, 4:43pm UTC](https://forums.chaos.com/t/ipr-issues/83981/9 "2017-07-20T16:43:34Z")
Thank god its not just me - i was starting to think is it my workstation ---
**Author:** ![leehumphries](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@leehumphries](https://forums.chaos.com/u/leehumphries)\ **Post date:** [July 20, 2017, 5:41pm UTC](https://forums.chaos.com/t/ipr-issues/83981/10 "2017-07-20T17:41:58Z")
I have sent the scene file over on ftp . I gave up trying to see what was going on - i am adjusting forest grass materials and IPR just shuts Max down. 5th time in 15 mins. Could using very hi-res textures cause problems ? ---
**Author:** ![leehumphries](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@leehumphries](https://forums.chaos.com/u/leehumphries)\ **Post date:** [July 20, 2017, 5:58pm UTC](https://forums.chaos.com/t/ipr-issues/83981/11 "2017-07-20T17:58:08Z")
Follow up - another crash. Isolated the grass area got what i wanted with IPR running unhide the rest of the scene instant crash ---
**Author:** ![yavor.rubenov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/yavor.rubenov/32/2946_2.png) [@yavor.rubenov](https://forums.chaos.com/u/yavor.rubenov)\ **Post date:** [July 20, 2017, 6:52pm UTC](https://forums.chaos.com/t/ipr-issues/83981/12 "2017-07-20T18:52:41Z")
Hello, If you could send a scene together with this reproducing steps - it would help us a lot to fix the crash. Best regards, Yavor ---
**Author:** ![leehumphries](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@leehumphries](https://forums.chaos.com/u/leehumphries)\ **Post date:** [July 20, 2017, 7:12pm UTC](https://forums.chaos.com/t/ipr-issues/83981/13 "2017-07-20T19:12:54Z")
Hi.Scene sent via FTP. Called Lode\_Architects\_Scene I have also taken the grass geometry into a brand new scene so nothing else there and still crashes on tweaking settings in forest