I have a report with multiple data providers that has been working fine. I added some columns and removed some other and for some reason I cannot edit the column headings.
Every time i double click in the column heading and then type to edit it I get an error “Variables are not compatible (DMB0008)” and the text in the column heading is not updated (stays with the original text).
Thanks for the advice. I found some additional information from Dave Rathburn at the bottom of another post (link to the post below) that was exactly my problem: A linked object that was in the report that was no longer linked.