Diagnosis
You should be able to distribute the worklist among parallel jobs usingthe value in field &V1& in table &V2&.
Unfortunately, &V1& is not contained in &V2&.

Procedure
Check whether the name in the input field in the "Selection of Valuesfor Grouping Worklists" has been spelt correctly, and correct it, ifnecessary.
If you did not make your own entry in this field, then it is aninternal error. In that case, contact your system administrator.