Troubleshooting models

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Intro

This page is to help find solutions to problems that can occur across multiple modeling commands. Errors specific to a certain command should be put on the appropriate wiki page for the command.

Troubleshooting FAQ

Part Turns Black

  • Cause: Faces that should be on inside are on outside
  • Resolution: Try creating part using commands in a different order

Part Design Command will not complete with Not Contiguous Solid error

  • Cause: Part Design commands only work with continuous body
  • Solution: Create sepereate body if there should be space between bodies or check that sketches are at least flush with existing body.

FreeCAD crashes while creating fillets or chamfers

  • Cause: OCC bug that causes a crash when an invalid fillet or chamfer is attempted
  • Solution: Change radius to valid value

My edge based features keep changing position

  • Cause: Topological naming is not stable meaning edge and face names change, changing which face etc. you feature is based on.
  • Solution: Finish the main design work of your solid body before applying features like fillets and chamfers.

My face based features keep changing position

  • Cause: Topological naming is not stable meaning face names change, changing which face your feature is based on.
  • Solution: Do not use the attach to face feature for defining sketchs. Use a datum plane instead.

Command fails to complete with TopoDS::Edge, TopoDS::Shell, BRep_API: command not done or BRep_Tool:: no parameter on edge

  • Cause: OCC call fails. The selection(s) made to define your command are incorrect or lead to a case that is not handled by OCC.
  • Solution: Try using different selections for command or using a different command.