Diagnosis
You move through a list of periods with the cursor and reach a periodin which there is no longer any statistical data in the performancedatabase MONI. If the statistical data was previously available in thedatabase, it has probably been deleted in a data reorganization.

Procedure
To extend the residence time of the data, use transaction ST03, menuGOTO -> PARAMETERS. Then choose REORG PARAMETERS, MODIFYPARAMETERS. You then change the residence time and save your entrieswith SAVE PARAMETERS .