Copy book flagged as missing is obsolete and is no longer used.
How to correct the error?
If the program calling the copy book is truly obsolete, it can be deleted from the project.
If not, the "Copybook Not Found" status is a serious problem with missing source code that
Revolve has discovered.
Need to determine why it's considered obsolete if a program is calling for it in it's code.
Copybooks are only ever "searched for" if they are used in specific code that is added to the project.