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What causes the error message: An Error has occurred in the Distributed Sparse Matrix Solver used by the PCG solver while saving the solver workspace data….

- March 17, 2023 at 9:00 am
  
  FAQ
  Participant
  
  The error stems from the distributed sparse (DSP) solver, which is used by the PCG solver when forming the preconditioner. In building the preconditioner, the code calls the DSP solver and at the end of factoring the matrix for the preconditioner, the code writes out the solver workspace to a file and frees the memory. This error message indicates that the saving of workspace failed for some reason. The matrix might be ill conditioned. One workaround is to try forcing the DSP solver from the beginning instead of PCG.

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