Problem:

When user copy and pastes source file from Editor window to another document, the copy and paste is incomplete.  Only a portion of the source file was copied.  The rest of the file is missing.

Resolution:

The issue is caused by the existence of NULLs in the source file.  These can be made visible by opening the source file directly in a program like Notepad .  These NULLs are generally created by the source management program and resolution will reside with the customer.