I am getting an exception when closing my app. It did not occur in 4.9.9.


In the destruction of the main form I explicitly close my connection which causes the following call stack:

IBODataset.TIBOInternalDataset.DoHandleError($585DF10,335544569,$8335FB0,$8336D70,-901,$8336DB0,$8336E30,True)
IB_Components.TIB_Session.DoHandleError($585DF10,335544569,$8335FB0,$8336D70,-901,$8336DB0,$8336E30,True)
IB_Session.TIB_SessionBase.HandleException($585DF10)
IB_Components.TIB_Statement.API_Execute($3855C50)
IB_Components.TIB_Dataset.SysExecSelect
IB_Components.TIB_Statement.SysExecStatement
IB_Components.TIB_BDataset.SysExecStatement
IB_Components.TIB_Statement.SysExecute
IB_Components.TIB_Dataset.SysExecute
IB_Components.TIB_Dataset.SysOpen('','',-2147483648)
IBODataset.TIBODataset.DoBeforeOpen
DB.TDataSet.SetActive(???)
DB.TDataSet.Open
IBODataset.TIBODataset.RefreshParams(True)
IBODataset.TIBOQueryDataLink.ActiveChanged
DB.TDataLink.SetActive(???)
DB.TDataLink.UpdateState
DB.TDataLink.DataEvent(???,0)
DB.TDataSource.NotifyLinkTypes(deUpdateState,0,False)
DB.TDataSource.NotifyDataLinks(deUpdateState,0)
DB.TDataSource.SetState(???)
DB.TDataSource.UpdateState
DB.TDataSource.DataEvent(deUpdateState,0)
DB.TDataSet.DataEvent(deUpdateState,0)
DB.TDataSet.SetState(???)
DB.TDataSet.SetActive(???)
DB.TDataSet.Close
IBODataset.TIBOInternalDataset.SysClose
IB_Components.TIB_Statement.SysUnprepare
IB_Components.TIB_Dataset.SysUnprepare
IB_Components.TIB_Statement.SysDeallocate(True)
IB_Components.TIB_Connection.DeallocateStatements
IB_Components.TIB_Connection.SysBeforeDisconnect
IB_Components.TIB_Connection.SysDisconnect
IB_Components.TIB_Connection.Disconnect
master.TfrmMaster.DisconnectData(True)
master.TfrmMaster.Destroy


which raises the following exception:

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Debugger Exception Notification
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Project trak.exe raised exception class EIBO_ISCError with message 'ISC ERROR CODE:335544569

ISC ERROR MESSAGE:
Dynamic SQL Error
SQL error code = -901
invalid transaction handle (expecting explicit transaction start)

STATEMENT:
qrySpouse.IBOqrqrySpouse(TIBOInternalDataset)

'.
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Break Continue Help
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the exception is not visible to the user, but is a pain when closing the app in the IDE.

What should I look for with the exception?

Ed Dressel