SAP Message 6A521 - Actual data of "&" incomplete; New calculation not possible

Diagnosis
You want to carry out a rent adjustment due to a modernization measurefor which there is already a settlement run. This only makes sense ifthe actual data (start, end and costs) of the measure is complete.

System Response
In this case, the actual data of modernization measure "&1" is notcomplete; it is not possible to carry out a new calculation.

Procedure
Maintain the actual data of the modernization measure.