Ошибка при загрузке отчета

Здравствуйте,
Скажите, пож-та, как определить в каком объекте произошла ошибка? При запуске отчета выдается след. код:

FastReport.Net v1.2.33
Exception has been thrown by the target of an invocation.
Inner exception:
Key cannot be null.
Parameter name: key
at System.Collections.Hashtable.get_Item(Object key)
at FastReport.Data.DataSourceBase.XG5v0WZni(Relation )
at 0ESZ03avAkCcSIxNwJC.NCguXSaZvM6mL0i5aNe.OfB2IHI9M(Dictionary , DataSourceBase , String[] , Boolean )
at FastReport.Report.xim00Tk8A(String )
at FastReport.Report.KCcl3u2Jr(String , Boolean )
at FastReport.Report.GetColumnValue(String complexName)
at FastReport.ReportScript.CalcExpression(String expression, Variant Value)
at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
at eJoC6h766JYVLFXS2r.PTA1vSPMGSDkHt4srP.Mn0RGw5sZ(Object[] )
at JM36tDmsPqvWCKcYlE.ZWhtiioDZElJpZaIWe.KcaqOTRF1(String , Variant )
at FastReport.Report.CalcExpression(String expression, Variant value)
at FastReport.Report.Calc(String expression, Variant value)
at FastReport.Report.Calc(String expression)
at FastReport.TextObject.GetData()
at FastReport.BandBase.GetData()
at FastReport.Engine.ReportEngine.cQE7RZOCA(BandBase , Boolean )
at FastReport.Engine.ReportEngine.Vbk4NnlWt(BandBase , Boolean )
at FastReport.Engine.ReportEngine.xGnXtGwAV(BandBase , Boolean )
at FastReport.Engine.ReportEngine.ShowBand(BandBase band)
at FastReport.Engine.ReportEngine.1415dRF5D(DataBand , Int32 )
at FastReport.Engine.ReportEngine.WULGsALyQ(DataBand , Int32 , Boolean , Boolean , Boolean )
at FastReport.Engine.ReportEngine.SLmH9TXfZ(DataBand )
at FastReport.Engine.ReportEngine.vtkRlAIhJI(BandCollection )
at FastReport.Engine.ReportEngine.WULGsALyQ(DataBand , Int32 , Boolean , Boolean , Boolean )
at FastReport.Engine.ReportEngine.SLmH9TXfZ(DataBand )
at FastReport.Engine.ReportEngine.vtkRlAIhJI(BandCollection )
at FastReport.Engine.ReportEngine.ZLYRpCUQpM(ReportPage )
at FastReport.Engine.ReportEngine.JNVRrRMomB()
at FastReport.Engine.ReportEngine.4NiuKUit3(Boolean , Boolean , ReportPage )
at FastReport.Engine.ReportEngine.PvcoyRnGd(Boolean , Boolean )
at FastReport.Report.Prepare(Boolean append)
at FastReport.Report.Prepare()
at qFGOGwZJ2h5cThhZeJA.VAssAkZK7nX0jP5uvvc.VdTCgELbW()

Спасибо.