Scenario: Attempting to save a large look up table value set in MS EPM 2010.
Cause: The time taken to popluate the large value set exceeds the time available to update the lookup table resulting in a time out error when a save is attempted on the the lookup tables data set.
Error: Timed Out error as per below snapshot:
Workaround: To overcome this issue save the look up table in more frequent and shorter intervals after making just a few updates rather than attempting to save all changes at once at the end.Failure to do this will result in the Timed out error and you will lose the data.:(