Unknown unit type error

- December 18, 2019 at 2:44 am
  
  AndyHor
  Subscriber
  
  Hi everyone , I always face the unknown unit type error during the overnight simulation for fluent, using university computer. Could anyone please help me ?
- December 18, 2019 at 1:49 pm
  
  Rob
  Ansys Employee
  
  Odd. Has anything changed, or will anything change at that solution time/timestep? What happens if you click iterate again?
- December 18, 2019 at 1:58 pm
  
  AndyHor
  Subscriber
  
  I had tried for many days in the uni lab. Because the lab closed at 5pm everyday, so I let it run overnight, but when i get back the next morning, it prompted this message. I didnot do any change on the computer. When I click ok on the error box, It say calculation completed and stop at the time step.
- December 19, 2019 at 11:51 am
  
  Rob
  Ansys Employee
  
  Weird. Try dropping the time step as you're aiming for convergence in 10-15 iterations. I wonder if it's a convergence issue somewhere. Also write a transcript (under File) so you can check when it fails: it could be IT related.
- December 19, 2019 at 2:28 pm
  
  AndyHor
  Subscriber
  
  Yes, could you please teach me on how to write a transcript to check ?
- December 19, 2019 at 3:09 pm
  
  Rob
  Ansys Employee
  
  Look in the File menu. There will be a "start transcript" option, may be down a menu level depending on whether you're also using Workbench.
- December 20, 2019 at 6:39 am
  
  AndyHor
  Subscriber
  
  Yes I am using Workbench R1. I found a funny trick, before I run overnight calculation, I have to save, close the Workbench, and restart again then run the calculation, It is okay then till now, 2 days. I will see whether it will prompt any error a few days later.
- July 2, 2022 at 8:31 am
  
  1456766892
  Subscriber
  
  oh god, I have the same problem.My calculation time step number is very large, do not know how to solve this matter.
- May 9, 2023 at 5:24 am
  
  Chaochao Wang
  Subscriber
  
  I also met the same problem, but only with fluent software, not workbench.

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