Writing Binary Dumps to restart simulations (simple restart) in MPP settings

- March 22, 2024 at 3:23 pm
  
  Andres.Mena
  Subscriber
  
  Hello all!
  
  For some reason I can't understand, some of my simulations suddenly terminate with no useful error message using the MPP solver. My solution to this is restarting the job, but no d3dump files were generated.
  I found the *DATABASE_BINARY_D3DUMP option, but I am a little unsure what value to use in CYL to write d3dump files. How can I determine an appropriate value of CYL? I guess I should divide the total time by a certain value associate with the timestep? Is there a way to force ls dyna to actually write the default d3dumpfiles after an error termination? I hope you can please help me.
  
  Thanks,
  Andres
- March 26, 2024 at 4:40 pm
  
  igandiko
  Ansys Employee
  
  Hello, you have to define the interval for writing out d3dump files. This is defined in terms of number of cycles (number of timesteps), see CYL parameter in the card. Of course, the smaller the number, the more restart points.
  https://ftp.lstc.com/anonymous/outgoing/support/FAQ_docs/restart.pdf
  /forum/forums/topic/best-way-to-restart-a-job-after-a-crash/