999999: mpt_accept: error: accept failed: No error

- February 2, 2021 at 5:53 am
  
  Anadi_Mondal
  Subscriber
  
  Hello ,nGreetings! I am trying to simulate annular flow in a tube. I am using DPM(Discrete phase modeling) and EWF (Eulerian wall film) along with UDF for mass and momentum source. I compiled UDF perfectly and set all the values and parameters. But, when I am trying to initialize the solution( standard initialization from all zones) , I am getting following error,nn999999: mpt_accept: error: accept failed: No errornn999999: mpt_accept: error: accept failed: No errornn999999: mpt_accept: error: accept failed: No errorn999999: mpt_accept: error: accept failed: No errorn==============================================================================Node 0: Process 18384: Received signal SIGSEGV.nn==============================================================================nn999999: mpt_accept: error: accept failed: No errornn999999: mpt_accept: error: accept failed: No errorn999999: mpt_accept: error: accept failed: MPI Application rank 0 exited before MPI_Finalize() with status 2n The fl process could not be started.nnI am using structured hexahedral mesh with 260000 elements and 265521 nodes. I select processing options 'serial' and I have 8GB RAM .nWill you give any idea to solve this issue?.Thank you.n
- February 2, 2021 at 12:39 pm
  
  Keyur Kanade
  Ansys Employee
  
  This error may come in due to many reasons. nFirst check your UDF. nPlease check if you can run it with double precision. nCheck your mesh quality. The min orthogonal quality should be more than 0.1. nYou have 2.6M cells and 8GB RAM. Can you please check if you can reduce mesh size? nRegards,nKeyurnHow to access Ansys Online Help DocumentnHow to show full resolution imagenGuidelines on the Student CommunitynHow to use Google to search within Ansys Student Communityn
- February 2, 2021 at 3:37 pm
  
  YasserSelima
  Subscriber
  
  SIGSEGV error is basically calling a location that is not identified. For example calling vel[3] while vel has a dimension of 3 or something of that kind.nThis type of error usually happens in loops where the loop goes beyond the vector length. Check your UDF loops and set a counter inside with a message. this might help isolating the problemn
- February 2, 2021 at 4:43 pm
  
  Anadi_Mondal
  Subscriber
  
  Hello Keyur!nI have checked the mesh quality . The minimum orthogonal quality is 0.7702. I run with double precision and I have 260k elements, not 2.6M. Now I need to check UDF. Do you have any other suggestions?nThank you for replying to my question.nRegards,nAnadin
- February 2, 2021 at 5:25 pm
  
  Amine Ben Hadj Ali
  Ansys Employee
  
  Role of the UDF?n
- February 2, 2021 at 5:38 pm
  
  Anadi_Mondal
  Subscriber
  
  Hello DrAmine,nThe UDF contains the mass, momentum sources for liquid film and vapor core as well as UDF for initialization of injection. I not sure where exactly I am making mistake. Would you give any idea to find the error?nThanksnAnadin

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999999: mpt_accept: error: accept failed: No error

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