Diagnosis
Real-time InfoCube '&V1&' currently has operating mode 'load data'. Youcannot use the InfoCube for planning while it has this operation mode.
As of SAP BW release 3.0A you can switch between different operationmodes for real-time InfoCubes in order to generate transaction data. Youcan either generate plan data or upload it in the conventional way usingInfoSources. You can switch between the two modes of operation as muchas you like, but they are mutually exclusive.

Procedure
To use the InfoCube for planning, switch the InfoCube into operationalmode 'Real-Time Cube Can Be Planned'.
You make this setting in the SAP BW Data Warehousing Workbench:
Choose the modelling view and then InfoProvider.
Select InfoCube '&V1&'.
In the context menu of the InfoCube, choose Switch Real-TimeInfoCube and make the required setting.