SAP Message RSM1299 - Loading transactional cube &1 - switch not possible

Diagnosis
Transactional InfoCube &V1& is currently being loaded with request &V2&
.
The loading process has not yet finished.
You are not able to switch the InfoCube into planning mode.

System Response
You are not able to switch the InfoCube into planning mode.

Procedure
Check request &V2& in the monitor, and wait until the processing hasbeen completed.

Procedure for System Administration
If there are any errors, set the status of the request to red or greenaccordingly.