SAP Message RSWWW009 - Map level "&1" contains no data in the rows

Diagnosis
The data provider for map layer "&V1&" has no data in the rows.

System Response
The map cannot be created, because at least one entry in the rows isnecessary.

Procedure
Assumedly you have selected the function "Specify Filter Value". Withmaps, however, you need to use the function "Specify Filter Value onAxis". This ensures that the selected entry is placed in the rows.