>...
>I do get that error message if I
>
>SET CLASSLIB TO rptuebase.vcx ALIAS Hilmar
>SET CLASSLIB TO rptueadvances.vcx ALIAS Hilmar additive

That I can understand (that this would cause an error message), but as far as I could see, this doesn't apply in my case:

The ALIAS clause is not used, in the command that provokes the error.

This could still cause an error if another classlib were opened with the same name, but no two classlibs have the same name. - (Note: I don't think a classlib with a DIFFERENT name was opened with the same alias, but I'll check again.)

Perhaps I'll just get rid of the SET CLASSLIB - it seems that the classlib was opened on program start. But I still wonder why this happens.

Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)