CUSTOM.pll is not identifying few forms names only..

We are facing 2 issues with CUSTOM.pll.

Issue1:

The CUSTOM.pll is not identifying all the forms names in our E-Business suite. It is identifying few forms like 'Universal Work Queue'..etc.

It seems, there is issue with the "name_in('system.current_form')" function.

Not sure why the form name is populating into the variable "form_name" in CUSTOM.pll for most of the forms.

Syntax:

form_name varchar2(30) := name_in('system.current_form');

Issue2:

We defined a custom library file and made a call to that pll file in the CUSTOM.pll.

But, while compiling the CUSTOM.pll file, we are getting 'Invalid Object' found error and CUSTOM.plx file is not generating.