Adding zfield on service order search ?

Hi Team,

i have added z field on Genil model browser dynamic query object -class-structure appened that structure only one zfield.after i have implemented the logic on EH_ONSEARCHBT but while i am in search in service order that time it gives dump.

Exception condition :PROBLEM_WITH_QUERY  raised.

Could you please help here ..we need to implement RFQ10search badi? how to implement?

Thanks & Regards

Kalpana