Thanks support. I have looked at that. I must be missing something obvious. If I set the spec setting in the Workstation Options (which holds) when I go to print an invoice and the setting is "use selected specification" the spec field is blank even though this is set in workstation options.

Since the settings won't hold in the customer record I can't use the "Current customer specification" option since the setting doesn't hold in the first place.

I have attempted to use the setting 'document specification" setting and that seems to work.

But not the other two options for whatever reason.