*MessageBox *WarningBox

*MessageBox. This command stops the execution of the .bas file and prints a message in a window; this command should only be used when a fatal error occurs.

Example:

*MessageBox error: Quadrilateral elements are not permitted.

*WarningBox. This is the same as MessageBox, but the execution is not stopped.

Example:

WarningBox Warning: Bad elements. A STL file is a collection of triangles bounding a volume.