Hah! Mad by name, certifiable by nature

You will appreciate that a lot has changed between versions 3.63 and 4.22. There are many new features, and some existing facilities will have been improved.

There may even have been some bug fixes.

For example, way back in version 4.00 RC1:
Quote:

Fixed @SCRIPTDIR in UDF's and in Execute().



You may view the change to @SCRIPTDIR as either an enhancement or a bug-fix.