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I make a simple midas appliaciton. The middle application has three doa control(orlcesession,oracledataset,provider ). client application has a clientdataset control,when two user open the clinetdataset at the same time,the middletier application hint 'invalid address operate',like multi thread...

I make a simple midas appliaciton. The middle application has three doa control(orlcesession,oracledataset,provider ). client application has a clientdataset control,when two user open the clinetdataset at the same time,the middletier application hint 'invalid address operate',like multi thread...

the appliaction is midas application. when one client get data from middletier it is no error.when two client get the same data(click the same menu),the middletier application is killed by windows server,no error hint.

there is no error hint,the process is killed.

i finished a multi tier project(delphi corba),but middle tier(use direct oracle access) run in single cpu machine is perfect,but run in multi cpu always error,i want known the reason.