"Error in the evaluation of expression..." with empty attributes

[Mike Pokraka]

Hi folks,
Has anyone seen problems in assigning empty attributes?

It's working fine in dev: I assign an object attribute with an object type
to a container element and check it later for various reasons. However
once transported to QA its all falling apart with "Error in the evaluation
of expression ....." when the attribute has no instance.

I've gone as far as doing a detailed trace and on one system the
assignment is followed by 'Node Processed' and the other does a
'SWW_WI_WRROR_MESSAGE_SEND' after the identical container operation.

OSS hasn't even heard of the error message number, but searching for the
error text just turned up a few older notes.
Stumped.....

Cheers
Mike Pokraka
Senior Consultant
Workflow Connections Ltd.
Mobile: +44 (0)7786 910 855