How to figure out a Cast Error?

jdreddjdredd
edited 5:31AM in FastReport VCL
Using Tokyo and Latest FR6 ...

One thing i've struggled with is this error on tracking down the offending field that is causing it.
exception class    : EVariantTypeCastError
exception message  : Could not convert variant of type (String) into type (Double).

main thread ($b94):
00470a97 +06f CMW.exe      System.Variants   679   +1 VarCastError
00470ede +01a CMW.exe      System.Variants   748   +3 VarResultCheck
00473be3 +08f CMW.exe      System.Variants  2537   +9 VarToDoubleAsString
00473f09 +1e9 CMW.exe      System.Variants  2612  +30 @VarToDouble
00474118 +008 CMW.exe      System.Variants  2646   +1 @VarToReal
00d4791d +205 CMW.exe      frxClass         9033  +21 TfrxCustomMemoView.FormatData
00d47563 +3e3 CMW.exe      frxClass         9001  +67 TfrxCustomMemoView.CalcAndFormat
00d46ed6 +3ca CMW.exe      frxClass         8886  +58 TfrxCustomMemoView.GetData
00ceeec4 +14c CMW.exe      frxEngine        1830  +33 TfrxEngine.Stretch
00cf19f3 +223 CMW.exe      frxEngine        2796  +58 TfrxEngine.DoShow
00cee6ca +05a CMW.exe      frxEngine        1638   +8 TfrxEngine.ShowBand
00ced286 +47a CMW.exe      frxEngine        1226  +84 ShowBandTree
00ceda7c +114 CMW.exe      frxEngine        1367  +12 ShowPage
00cedd5e +102 CMW.exe      frxEngine        1418  +27 TfrxEngine.RunPage
00ceb2c1 +0e5 CMW.exe      frxEngine         514  +14 DoPages
00ceb31e +026 CMW.exe      frxEngine         523   +3 TfrxEngine.RunReportPages
00ceaf42 +1b2 CMW.exe      frxEngine         435  +37 TfrxEngine.Run
00d558e3 +1df CMW.exe      frxClass        13517  +43 TfrxReport.PrepareReport
0197bf8a +372 CMW.exe      dm_FastReports    511  +73 tCMFastReports.ShowReport
0197f950 +788 CMW.exe      dm_Reports        514 +105 TdmReports.InvoiceReport

Some of my reports get overly dumb complex and query heavy and its hard to track down on a customers system sometimes.

It would be nice to actually somehow figure out the field that failed from FormatData ?


Comments

  • jdreddjdredd
    edited 5:31AM
    FYI I am getting this problem alot via a program that calls mine to print from a Session 0 in Windows 10.

    If I run the same deal logged in, it works fine.

    If ran from Session 0 , I noticed ALOT of variant conversion errors.

    Possibly something SetThreadLocale / Locale related and Session 0 with FR ?

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