# Occasional IPR crashes **URL:** \ **Category:** Issues\ **Created:** [July 10, 2017, 11:20am UTC](https://forums.chaos.com/t/occasional-ipr-crashes/83822 "2017-07-10T11:20:18Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![BBB3](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/bbb3/32/58232_2.png) [@BBB3](https://forums.chaos.com/u/BBB3)\ **Post date:** [July 10, 2017, 11:20am UTC](https://forums.chaos.com/t/occasional-ipr-crashes/83822/1 "2017-07-10T11:20:18Z")
Hey, I’ve experienced quite a few crashes when using the IPR (CPU) on a complex scene. It happens most often when tweaking parameters in large procedural objects, such as GrowFX and Itoo Forrest Pro, which need to recompute meshes with every adjustment. Seems the IPR often chokes on those changes and everything crashes, though I get to send a CER report. Obviously, I’m not certain it’s an IPR bug. It could be Max. But my limited experience of Max 2018 is that it’s been rock solid. Very few crashes so far apart from those. I’m running V-Ray 3.6 in Max 2018 on Windows 10 CE. Old HP Z820 workstation with twin Xeon and a GTX 1080ti. ---
**Author:** ![matanov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/matanov/32/21656_2.png) [@matanov](https://forums.chaos.com/u/matanov)\ **Post date:** [July 10, 2017, 12:26pm UTC](https://forums.chaos.com/t/occasional-ipr-crashes/83822/2 "2017-07-10T12:26:50Z")
Send us the crash dumps (in %temp%) after the crashes. It will be even better if you can provide a scene and reproduce steps. ---
**Author:** ![BBB3](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/bbb3/32/58232_2.png) [@BBB3](https://forums.chaos.com/u/BBB3)\ **Post date:** [July 10, 2017, 1:38pm UTC](https://forums.chaos.com/t/occasional-ipr-crashes/83822/3 "2017-07-10T13:38:25Z")
Sorry. Where do I find those? ---
**Author:** ![Miro](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/miro/32/2302_2.png) [@Miro](https://forums.chaos.com/u/Miro)\ **Post date:** [July 10, 2017, 1:50pm UTC](https://forums.chaos.com/t/occasional-ipr-crashes/83822/4 "2017-07-10T13:50:47Z")
Look in your Windows temp folder (type “%temp%” without the quotes in Windows explorer) ---
**Author:** ![Syclone1](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/syclone1/32/6794_2.png) [@Syclone1](https://forums.chaos.com/u/Syclone1)\ **Post date:** [July 11, 2017, 1:24pm UTC](https://forums.chaos.com/t/occasional-ipr-crashes/83822/5 "2017-07-11T13:24:55Z")
Ive run into that with large and small files using IPR and adjusting settings of forest objects. If I can Ill see if I can make a simple scene to send today… ---
**Author:** ![vlado](https://avatars.discourse-cdn.com/v4/letter/v/779978/32.png) [@vlado](https://forums.chaos.com/u/vlado)\ **Post date:** [July 11, 2017, 4:08pm UTC](https://forums.chaos.com/t/occasional-ipr-crashes/83822/6 "2017-07-11T16:08:24Z")
> [@Syclone1](#): > > If I can Ill see if I can make a simple scene to send today… Thank you, this will be super helpful! Best regards, Vlado ---
**Author:** ![BBB3](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/bbb3/32/58232_2.png) [@BBB3](https://forums.chaos.com/u/BBB3)\ **Post date:** [July 12, 2017, 7:42am UTC](https://forums.chaos.com/t/occasional-ipr-crashes/83822/7 "2017-07-12T07:42:20Z")
And I just sent the crash dump to support via email. ---
**Author:** ![Syclone1](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/syclone1/32/6794_2.png) [@Syclone1](https://forums.chaos.com/u/Syclone1)\ **Post date:** [July 13, 2017, 4:04am UTC](https://forums.chaos.com/t/occasional-ipr-crashes/83822/8 "2017-07-13T04:04:31Z")
> [@vlado](#): > > Thank you, this will be super helpful! > > Best regards, > Vlado As it stands of course my file it behaving as it should and not crashing, will send files if/when it does again. ---
**Author:** ![Fat\_Tony](https://avatars.discourse-cdn.com/v4/letter/f/bb73d2/32.png) [@Fat\_Tony](https://forums.chaos.com/u/Fat_Tony)\ **Post date:** [July 16, 2017, 3:17pm UTC](https://forums.chaos.com/t/occasional-ipr-crashes/83822/9 "2017-07-16T15:17:34Z")
I was told that iToo is not updated yet for IPR in vray 3 versions. it happens when doing any tweak even with bacis FP or RC object in the scene. You can render when not touching the object, but any adjustment during IPR running will crash max. ---
**Author:** ![matanov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/matanov/32/21656_2.png) [@matanov](https://forums.chaos.com/u/matanov)\ **Post date:** [July 17, 2017, 8:22am UTC](https://forums.chaos.com/t/occasional-ipr-crashes/83822/10 "2017-07-17T08:22:13Z")
> [@Fat\_Tony](#): > > I was told that iToo is not updated yet for IPR in vray 3 versions. it happens when doing any tweak even with bacis FP or RC object in the scene. You can render when not touching the object, but any adjustment during IPR running will crash max. Try the latest versions of both FP and RC (and latest V-Ray) and if there are still problems - send the scene(s) to chaos support.