Empty watch expression
The Add Watch dialog box requires entry of an expression. This error has the following cause and solution:
You didn't supply a watch expression in the Add Watch dialog box.
Add an expression to the Add Watch dialog box or press the ESC key.
For additional information, select the item in question and press F1 (in Windows) or HELP (on the Macintosh).
Have questions or feedback about Office VBA or this documentation? Please see Office VBA support and feedback for guidance about the ways you can receive support and provide feedback.