To advise you of error conditions or for providing other reminders while a procedure is running, use an informational dialog. Unlike some dialogs, informational dialogs cannot accept your input.
Using the Pause command, you can temporarily halt a procedure and display a message. The procedure will not continue until you click [OK] in the dialog. Pauses may or may not depend on a condition and are frequently used to alert users of inappropriate input data. For more information, see Pause.
If a procedure halts due to an error, the Command Log will display the line number where the procedure failed. Additionally, the procedure is opened and a red arrow is used to point to the line that failed. Alternatively, users can edit the procedure in the Procedure Editor and either scroll to the specified line number or use CTRL-G to advance directly to the specified line number.