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AutoCAD Based Calculations (Ribbon/Toolbar/Location)
Description:
When running AUDIT command, you get an error message "AcDbLayerTable could not be repaired" message
Running Calc Checkups with 'Check for 3D model errors' turned on would corrupt the HPIPECGEN layer. During the AUDIT, it will have a problem with the layer, and sometimes remove the layer altogether.
HydraCAD v57.05 has removed this option from the Calc Checkups, if you're on a previous version, you'll have to remember to uncheck this box before proceeding with checkups.
You can check for 3D model errors by using the command hcad_walkautocalcmodel