Error while executing query at bo
I had created data flow in bw datasource,dso and cube and created a report on top of cube and in bex query i had drag and drop char and kf and in filters characterstic restrictions i had restricted employee with variable type characterstic variable represents interval and variable is ready for input and cal month also kept in filters and had run rsrt for this query its working fine but in webintelligence rich client when i opened taken source as bex and design panel i had done drag and drop and made to run query at that time for cal month i had done refresh it is showing values but for employee i had done refresh means its not showing values and its hitting me error
ERROR BRAIN (629): Specify a value for variable
ABEND BRAIN (670): An error occurred when getting data from the processor.
i had tried in another way keeping variable reprsents single value selection option and kept optional also i tried every thing is working fine in rsrt but in bo issue is coming and if i am creating other variable for other objects its hitting error but if i am using the existing variable its running without hitting any error if any body faces this issue please give me a clear solution.