Any work-arounds to what appears to be a bogus error message?
Multiple buttons to control a movie and one (defined with the exact same process/steps as the others) results in the 1120 error.
No syntax error, but test run results in 1120 error on the P_button event
Instances are established for both and the names are spelled correctly. Is there some undocumented feature about what characters can't be used in instances and button/movie definitions?
In your publish settings select the option to permit debugging. THen run the file again and show the exact error message you are receiving.
I put them both buttons on the same layer and it works, thanks!