Runtime Error 2055 - what the heck?

[pullingteeth]

I am getting the following error:

Runtime Error 2055 The expression '|' you entered is invalid

The code in question is attempting to msgbox a text field on a report, in the report_activate event procedure. The code works when the report is opened from the database window, but not when it is opened from a form with a where condition. What does this error mean, and how should I alter it?

Thanks

 

[pullingteeth]

I solved this through trial and error. It was happening when there was no data in the report; and my no data event procedure (which closes the report) was not being triggered because it wasn't registered in the event procedures, since I had copied & pasted it into the code. Now it works, because the no data event procedure is triggered before the report activate event procedure, thus preventing meltdown.