I have made a query in access 2013. It works fine but sometimes it causes appcrash. When I open the database first time and open that query it causes an appcrash but if I open the database and open that same query in design mode and just save it once(without any changes) then it works fine until I close it an re-open it. There is DSUM function which causes this problem. If I remove that dsum then it works fine everytime. Please tell me a solution