Diagnosis
Report "&V1&" that is maintained in Customizing must have the fieldcontract number as a ready for input field and as a selectionoption (complex selection).

Procedure
You can either adapt report &V1& with report typeV2, or maintain another report in customizing.
INCLUDE ISIS_PENCIL OBJECT DOKU ID TX

Notes
Selection options can be generated with global variables. SAP suppliesthe global variable &CTRTBUID for the contract number field.