Report Variable reset problem

khawar.naseerkhawar.naseer
edited 6:37PM in FastReport VCL 5
HI am using built in ado query with date parameter in report's data tab date parameter of query is bound to report variable which is being set from report code.

Every thing works fine so far and report works ok

Report has a drill down group when group is expanded or collapsed variable that provides value to query parameter is reset to zero and report gives error

Please guide how to overcome this issue

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