usually I crash when cooking in UE, I cannot find the crash log for the process

Hi,

Crash logs depend on who's crashing, Houdini or Unreal ?

For Houdini crash logs, they're generally in your appData/temp directory, see
https://www.sidefx.com/faq/question/445/ [www.sidefx.com]

If Unreal is crashing, then the crash logs will generally be in your project's Saved/Logs folder, or in the Saveds/Crash folder:
https://dev.epicgames.com/documentation/en-us/unreal-engine/crash-reporting-in-unreal-engine#wheretofindlocalcrashreports [dev.epicgames.com]