Gaurav Sharma
Hi Arash What version of Discovery Live are you using? Please confirm:
  • If the graphics card is updated upadated from NVIDIA website . We do  recommend updating from the website itself.
  • For version 2019R2,  are you looking for the NVCUDA file at  C:Program FilesANSYS Incv194scdm .  Please note 2019R1 refers to folder  C:Program FilesANSYS Incv193scdm
You may also try to run DL on different GPUs you have on your machine. For this, right click on discovery Live icon on desktop and select "Run with graphics processor" and select the other GPU (which is not default) to see if it helps. Thanks & Regards, Gaurav