Diagnosis
The time dependency of attribute &V2& for characteristic &V1& has beenchanged.

System Response
As time-dependent and time-independent attributes appear in variousmaster data tables, the master data has to be converted. Activation cantherefore take longer, if the master data tables contain a lot ofentries.
If the time dependency for attribute &V2& is switched on, it can nolonger be used in aggregates. The affected aggregates are deactivated.

Procedure
If activation takes a very long time or is canceled because of timeout,you will have to carry out the activation in the background. To do thisselect 'Characteristic -->Activate in Background'.