Bob and Harm,

Thanks for all your help and sticking with this.

The parameter on my machine is in two places but only one seems to be in use. That's in c:\program files (x86)\VDF16.1\Pkg\ I changed this to "" (from <undefined>) and after a precompile of the system packages it now works correctly (in my view!).

The .inc file is read only so this needs changing before being modified. If something other than <undefined> or "" is needed - for example <bl> for blank - that too will work.

Kind regards,