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Fatal IO Error: An Error Occurred


An error occurred.

What happened?

  • The simulation failed to start due to a fatal IO (Input/Output) error.

What could be the possible reason?

  • The solver has crashed as it could not find a neccessary system file.
  • If you were attempting a ‘CaseUpload’, some files may be missing, have incorrect format or may be broken/corrupt.

What can I do now?

  • If you have encountered this in a simulation that was setup on the SimScale workbench, please report it to ‘Support’ via the ‘contact us’ link below.
  • If you were attempting a ‘CaseUpload’ please make sure all neccessary files are present, have the correct format/type (non zipped) and are not corrupt.

Important Information

If none of the above suggestions did solve your problem, then please post the issue on our forum or contact us.


Last updated: June 28th, 2020

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