FRM-40010: Cannot read form xxx.fmx

Cause: One of the following:
1. You entered a nonexistent form name.
2. You typed an incomplete path or path does not exists
3. You do not have the proper privileges to run the form.
4. You do not have a compiled copy of the form.

Action: Retype the form name correctly, provide the proper path name, compile the form, or contact the DBA.

Note: try add the path of your fmx files to FORM90_PATH in your Registry or add the path of xxx.fmx directory to the default.env.