Diagnosis
The items you specify under "Location of Values" on the "Equity" tabmust all have the item type "Balance Sheet".
Item &V1&, which you specified for the activity &V2&, does not have theitem type "Balance Sheet".
Note: You do not have to explicitly specify item &V1&.Alternatively, you can specify a range of items that contains item &V1&
.

Procedure
Either change the item type of item &V1& for the activity &v2&, or donot use this item.