Hi folks.. Anybody with the problem in simulation (flipfluid) with hython error? In my case, when I start the white_water Sim, after few frames it instantly bluescreen my system. (what a surprise windows haha ) Sometimes, before crash, houdini popup hythone.exe error warning. Anybody knowing, what should causes the problem? May it be something to do with NVidia drivers?

My specs:
Ryzen TR /256 RAM
RTX 4090 / latest studio_driver 528.24

I used to have lot (hell lot) of BSOD due to running my ram at a frequency that couldn't be handled by my system when using 128gb.
It a recurring problem with threadripper.

I suggest you run a memtest

SciTheSqrl
I used to have lot (hell lot) of BSOD due to running my ram at a frequency that couldn't be handled by my system when using 128gb.
It a recurring problem with threadripper.

I suggest you run a memtest

Thanks for the interest. Yes, I can definitively exclude the possibility that it is a graphics driver, because I tried one older and the same issue. However, that problem came to me from one day to another and I'm facing it first time. I also tried to caching sim to another disk, reinstal Houdini... still same problem. So you think it's a RAM problem? OK, I ran WIN utility memory test now, so waiting for results... I read it can be more than 10 hours...? omg..
Thanks anyway

you say you have 256GB of ram using a threadripper, so I assume you have a 8x32gb setup, threadripper system run on 4 memory channel which mean they are most suited for 4dimm only, by populating the 8 slot, the memory controller will struggle keeping up.

the windows ram utility is probably not enough to test the stability, you get these stability issues when you're running simulation because it very likely that your computer start using a certain amount of memory that force it into the extra 4 dimmm, and that when the crash will occur. so, basically, your instability will grow the more ram you use.

this is a simplified exaplanation, you can read more in detail here : https://forum-en.msi.com/index.php?threads/ram-explained-why-two-modules-are-better-than-four-single-vs-dual-rank-stability-testing.363139/ [forum-en.msi.com]
consumer cpu are usually 2 channel, but threadripper are 4 channel, so everything explained is the same, you just multiply the potential dimm by 2.

I do not recommend using the windows memory utility, that is not a reliable way to test your memory, use memtest86, put it in an usb key and boot your computer on it.
it can take very long indeed, but for that kind of problem, it very likely that it happen very soon in the test. as long test are usually done to test for faulty memory, in your case, you're testing the overall stability under load.

when you finish your test and you indeed confirmed that you run into memory problem, here are a few solution I did for my setup :

-Reduce memory frequency in bios (and adjust mem timing accordingly, I can't help with that)
-Remove a couple stick (check your motherboard manual to make sure you're used the recommended memory layout)

repeat one or both of these solution until your system is stable.
256 Gb of memory is really a lot, so consider if that really an amount of ram you're gonna use, even for fluid simulation.