3401325 - The Customer Exit variable is not working properly in BWMT Reporting Preview.

In BWMT Reporting Preview:
At the first time when executing the query without changing the variable entry, it's showing the correct data.
But after re-executing the variables with different values, The data still the same and has not gone through any filtering process.
When executing again with the same values, the exit is executed properly and showing the correct data.

In RSRT, the following error occurs:
"Characteristic value &1 of characteristic &2 has more than &3 characters BRAIN_DEV/005"

• BW Modeling tool Query Designer.

BW , Customer exit , variables , HANA Studio , Modeling Tool Query Designer , BWMT , Reporting Data Preview , wrong filter , wrong data. , KBA , BW-MT-ELEM , Query Designer in BW Modeling Tools (Eclipse) , BW-BEX-OT-OLAP-VAR , Using Variables , BW4-AE-CORE-VAR , Variable (Runtime) , Problem