BICS Connection short dump error in web

Hi

one of my Bex query having customer exit variable , created BICS connection , webi side when  click the connection creating dump error in BW side

if remove all variables in Bex query it working fine , those customer exit very import for my report, why creating dump with variables.

error snap shot attached.

BW Version 7.4 SP6

BO Version 4.1 SP1

heart full thanks to who provide early solution , very urgent ....................

Thanks

Ramesh G