If Popup Error Messages is checked, Error messages are displayed in an Error Dialog and execution is suspended until the user selects OK in the dialog. Otherwise, Error Messages are written in the Transcript Window and execution proceeds.
Error messages indicate a bad problem with the geometry model or input. When input is from a file, Error Messages are often followed by Question Dialog inquiring whether Sabrina should continue.
The state of Popup Error Messages is saved in the sabrina.ini initialization file.