When you use Microsoft Access 97 to convert a database, open a database, or import a form or report created with an earlier version of Microsoft Access, you may receive some or all of the following error messages.

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Converting a Database

    Microsoft Access can't open the form <form name>.

    It contains data that Microsoft Access doesn't recognize.
    Re-create the form or, if you maintain backup copies of your
    database, retrieve a copy of the form.

    Followed by the message:

       There were compilation errors during the conversion or enabling of
       this database.

       The database has not been saved in a compiled state. The performance
       of the database will be impaired because Microsoft Access will need
       to recompile the database for each session. For information on
       improving performance, click Help.

    Followed by the message:

       The Save operation failed.

    Followed by the message:

       Device I/O error
				

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Opening (Enabling) a Database

   The form or report <object name> has too many controls.

   Reduce the number of controls on the form or report before
   using it in this version of Microsoft Access.

   Followed by the message:

      Invalid operation.

   Followed by the message:

      There were compilation errors during the conversion or enabling of
      this database.

      The database has not been saved in a compiled state. The performance
      of the database will be impaired because Microsoft Access will need
      to recompile the database for each session. For information on
      improving performance, click Help.

   Followed by the message:

      Unexpected error (32811)

   Followed by the message:

      The Save operation failed.

   Followed by the message:

      Unexpected error (32811)
				

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Importing a Form or Report

   The form or report <object name> has too many controls.

   Followed by the message:

      Invalid operation.

       -or-

      Unexpected error (32811)
				

When you receive any of these error messages, the object is not imported.

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There is at least one form or report in your database that contains a Visual Basic for Applications module and has 754 or more combined controls, sections, and fields in the RecordSource property.

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Use the version of Microsoft Access with which you originally created the database to modify the design of the form or report. Decrease the total number of sections, controls, and fields in the RecordSource property to fewer than 754.

If the record source for the form or report contains a large number of fields that you do not need to display, consider creating a query that only selects the fields that you need to display, and set it as the RecordSource property for the object.

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This behavior is by design.

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Microsoft Access 97 limits the total number of controls plus sections plus fields in the RecordSource property to 754. For example, if a form contains a detail section, 500 unbound text boxes, a Visual Basic for Applications module, and a record source that contains 255 fields, you receive the errors listed in the "Symptoms" section when you convert or open the database in Microsoft Access 97. This occurs even though none of the fields in the RecordSource property are actually used on the form.

                  Number of Controls: 500
                  Number of Sections:   1
    Number of Fields in RecordSource: 255
                                      ---
                                      756
				

If a form or report does not contain a Visual Basic for Applications module but does exceed the 754 control limit, the conversion may succeed, but you may receive other errors when you try to design or use the form in Microsoft Access 97.

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For more information about Microsoft Access 97 specifications, search the Help Index for "specifications," or ask the Microsoft Access 97 Office Assistant.

For more information about converting databases, search the Help Index for "converting databases," or ask the Microsoft Access 97 Office Assistant.

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