Errors in MFC apps

This is a discussion on Errors in MFC apps within the Windows Programming forums, part of the Platform Specific Boards category; When I make an MFC application and something goes wrong during run time the app will often throw up an ...

  1. #1
    Registered User
    Join Date
    Sep 2001
    Location
    England
    Posts
    121

    Errors in MFC apps

    When I make an MFC application and something goes wrong during run time the app will often throw up an error that I didnt write, and doesnt appear anywhere in the source or string tables. There is one 'error' that I would like to remove completely. I am making a frontend for a (huge) database, but on running the program I get 'too many fields defined' error.

    I would like to change the maximum limit or remove this error completely, as susrely the amount of maximum fields should depend on free resources etc, and is not constant.

  2. #2
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    Join Date
    Sep 2001
    Location
    England
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    Through further research I've found this is an error specific to access databases with more than 255 fields. Still if anyone knows how to remove this limit I'd appreciate it.

  3. #3
    Registered User
    Join Date
    Aug 2001
    Posts
    223

    dao errors

    trap the error and look at the help files indicated for the error


    Code:
    try{
    
       ....dao operations here
    
    }
    catch( CDaoException* e )
    {
    
        int iErrorCount = e->GetErrorCount();
        CString sMsg;
        CString sFullMsg;
        for( int i = 0; i < iErrorCount; i++
        {
             e->GetErrorInfo( i );
             sMsg.Format("Error code %d\nSource %s\nDescription %s\nHelpFile %s\nHelp Context %d",
              e->m_pErrorInfo->m_lErrorCode, e->m_pErrorInfo->m_strSource, e->m_pErrorCode->m_strDescription, ...m_strHelpFile, m_lHelpContext);
             sFullMsg += sMsg;
             sFullMsg += "\n";
         }
    
         MessageBox( sFullMsg );
         
    }
    Usually the associated help files jeterr...hlp have some pretty direct causes and I am able to fix my program from there...
    zMan

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