When I compile a package with F9, this warning keeps popping up. Can I disable this warning through a setting in Toad?
That error comes from Oracle, it means there is something wrong in your code.
See my example below - I have no column called "BLAH" and I get the error.
Please turn on Spool SQL and post the output here so we can see which SQL causes the error message.
Main menu -> database -> spool sql -> spool to screen.
Then compile a package to make the message appear
SQL that Toad runs will be captured in spool sql output at the bottom of Toad.
Please post that here, along with your Toad and Oracle versions.