A general failure occurred during the solution process

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  • Last Post 27 November 2019
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JosiSandoval posted this 21 November 2019

Hi!

 

I'm getting a error of "A general failure occurred during the solution process" in my simulation. The solutions converges, but I suppose it fails in writing the results. In the solution output, no error is shown. I'm not sure what is causing the problem, is it the model or something about the software?

 

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peteroznewman posted this 22 November 2019

The output file shows the following interesting statements...

EXIT ANSYS WITHOUT SAVING DATABASE


 NUMBER OF WARNING MESSAGES ENCOUNTERED=          6
 NUMBER OF ERROR   MESSAGES ENCOUNTERED=          0

 *** WARNING ***                         CP =    9355.156   TIME= 04:09:18
 During this session a solution was performed using 6 CPU cores in       
 shared-memory parallel (SMP) mode (-np 6).  It is strongly recommended  
 to use distributed memory parallel (DMP) mode instead (-dis -np 6).     
 DMP mode typically outperforms SMP mode, even when running on a single  
 system.  For more information, see the ANSYS Parallel Processing Guide  
 in the ANSYS Help system.                           

You somehow configured Workbench to not save the database at the end of the solution. I don't know how you did that.  See if this post applies.

You should also edit the Solve Process Settings and turn on Distributed Ansys and see if that reduces the solution time.

 

JosiSandoval posted this 26 November 2019

I have no idea how I managed to configure the Workbench to not save the data. Is there a way to fix that?

When I turned on Distributed Ansys, after the solution was solved, the mechanical  closed immediately without saving anything. That happen a couple of times until I shut down the workbench. After I shut down the workbench and opened and run it again and I got the results. But in the output solutions, it still says EXIT ANSYS WITHOUT SAVING DATABASE.

Attached Files

JosiSandoval posted this 27 November 2019

Hi,

I  have modified some dimensions of my geometry using the table of design points, and run the solver again and the same error happened. The solver output gives results but the results are not written. I closed the workbench and I open it again and suppressed the solutions and then unsuppressed one by one and solve for each. It did solved and wrote the results. 

Why is this happening? I will like to solve the model from the Parameter section on the workbench, as I'm planning to do a DOE. But with this issue with the results I cannot do it. 

Any suggestions why is Ansys now writing the results or how can I configure the Workbench to save the data.  I'm still getting this message on the solver output "EXIT ANSYS WITHOUT SAVING DATABASE"

Thanks a lot!

peteroznewman posted this 27 November 2019

Does it do that on a new model? If you archive your model and attach the .wbpz file to your reply, I can see if the problem persists on my computer.

JosiSandoval posted this 27 November 2019

I run it first with the nominal values (design point 1) and it wrote the results. 

I'm attaching the archive file.

 

Thanks!

JosiSandoval posted this 27 November 2019

It seems I cannot attached the file. It just says to wait after I click on upload file, but it is not being uploaded. 

 

Is it normal that it takes this long to upload the file?

JosiSandoval posted this 27 November 2019

Is there another way to share the file? 

peteroznewman posted this 27 November 2019

The file size limit for attachments is 120 MB. You might have to archive without results to stay below that limit.  You might have to Clear Generated Data on the model to delete the mesh to stay below that limit.

If those don't get you below the limit, you can send a link to a Google Drive or Microsoft OneDrive.

JosiSandoval posted this 27 November 2019

I cleaned the generated data. It works now

peteroznewman posted this 27 November 2019

What does the ACT Zero Leakage do?  I don't have that installed.

JosiSandoval posted this 27 November 2019

It is a post processing tool to measure the leakage between  the contact surface of the ball and seat, it generates some plots. You can just suppressed that part. When there is a gap between the ball and seat it fails to generate the plots

peteroznewman posted this 27 November 2019

Okay, I ran your model. All the results had a red lightening bolt icon at the end of the solution.

I deleted all the results (not the solution) and recreated results and now they have green check marks.

It very rarely happens to me that a result gets "broken" and I resolve it by deleting and recreating.

 

JosiSandoval posted this 27 November 2019

So should I just delete the results and create them again? The weird think is that is something when I run it, it does write the results without problem and some other times I get   red lightening bolt.

Were you able to run the model with both design points?

Last question. On the solver output do you still see the message saying "EXIT ANSYS WITHOUT SAVING DATABASE"

Thanks!

 

peteroznewman posted this 27 November 2019

Yes, I believe EXIT ANSYS WITHOUT SAVING DATABASE is a normal message. The issue you had was the broken results.

I can't run the Design Points because I don't have the SolidWorks files needed to update the geometry.

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