>Hi,
>
>After I compile and build an application I get a message that two variables are undefined. This is one of the the lines:
>
>

>Visual Class Library mylibrary.vcx has the following errors:
>    Unknown APOSTEDMATERIALS - Undefined
>

>
>The aPostedmaterials is an array. And it is used in a few places. What does "undefined" mean?
>
>TIA.

In the procedure that uses this array add

EXTERNAL ARRAY aPostedMaterials

This is a compiler error and it can also be safely ignored.