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Typical error message found in the LUSAS Solver text output file (*.out):

***SYSTEM ERROR*** (IOMRWF PROCESSOR) NERROR=


Most common causes & links to solutions 

This error message originates from a section of the software that is reading/writing data to a direct access (scratch) file. The possible reasons for the error are listed with suitable solutions below:

PC settings may cause temporary files to clash with virtual memory

  1. Relocate or re-size PC virtual memory

  2. Relocate LUSAS temporary files

  3. Relocate Windows temporary files

PC  hard drive may be getting full

  1. Clear temporary files, and delete, archive or compress files on the drive as appropriate to make space.

  2. Relocate the model file & results files to another drive 

Still encountering problems?  Try the database error checklist


More on cause & theory links

More on how LUSAS uses PC resources 


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Any modelling, design and analysis capabilities described are dependent upon the LUSAS software product, version and option in use.