Opening report for last month - keep getting Runtime error 13: Type mismatch

[lhgrappler]

For anyone who is curious, I did a bunch of 'testing' and any time a date variable or function was used anywhere in the code for the particular form it would throw the type mismatch error. This made me a bit batty - because it *should* work.

I got around this by duplicating the underlying query & report, using the date criteria in the query and it everything went as expected. Definitly more 'clunky' this way, but it works