Add $AU_TOP/forms/US (or the location to the APPSTAND.fmb) to your $FORMS_PATH, recompile your form and try again.
That resolved my problem.
I have similar problem while compling custom form. I did the following to resolve the problem.
Copy the Custom Form in $AU_TOP then Compile the form, then place the fmx file in custom top.
frmcmp_batch module=CUSTOM_FORM.fmb userid=USER_NAME/PWD output_file=$CUSTOM_TOP/forms/US/CUSTOM_FORM.fmx module_type=form compile_all=special