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Report runs in Visual Studio, and in Web Add-On CR Viewer, but not in WinForms CR Viewer Control

I have a Crystal Report that runs fine in Visual Studio preview mode, and it runs in an old Crystal Decisions, Inc. web based viewer control, but in my C# .NET Windows Forms application it throws the error below. Is there any way to get the report to run in the Windows Forms application without editing the report? We have a large number of these reports and it would be a lot easier if we didn't have to edit them all.

CrystalDecisions.Shared.CrystalReportsException: Load report failed. ---> System.Runtime.InteropServices.COMException: Error in formula name 'm ({@Ext_Q_Total}, {T_PRO_DAT.LEI_TEAM}', reserved characters '{', '}', '@', '?' cannot be used in formula name.

Thank you,

Joe G.

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2 Answers

  • Best Answer
    Sep 08, 2017 at 07:30 PM

    Hi Joe,

    Correct, CR does add them which is why you cannot use them, something else in the report is causing the issue.

    Did you run the app and use the Formula to check all of them?


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  • Aug 29, 2017 at 07:41 PM

    Hi Joe,

    Unfortunately no, we added that filter because it was causing problems for the DB engine and Report formatting engine.

    Reserved characters are typical for most programs, most are the upper row of the keyboard and should always be avoided when creating names for anything. Even some DB's do not allow those shift characters, for those what we did was use an Alias and replace then with underscores.

    The runtime is also available from this link now:

    On that page is an I wrote that you can use to check all reports using the .Check() method.

    It's in the dropdown list box on the right.

    What you could do by using in combination with Check is to replace the formula name and update the reports on the fly. Just use the SaveAs to either overwrite the original or make a copy and then overwrite it so it doesn't need to be fixed the next time.


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    • Former Member

      Hi Don,

      Thanks for the reply.

      We named the formula "Ext_Q_Total" but the @ and brackets {} were added by Crystal when this formula is used in another formula, or even in a group sum. If the @ and {} are a problem, Crystal adds those in automatically. Those are things we can't change because Crystal formats them that way...or are we misunderstanding something?