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Error: 41 /memo file reportdefinitions.fpt is missing or invalid

This support note applies to:

  • AO Classic Tax (AU)

  • AO Classic Practice Management (AU)

  • AO Classic General Ledger (AU)

  • AO Classic (NZ)

Article ID: 32655

In MYOB Accountants Office (AO) you may experience the error "41 /memo file reportdefinitions.fpt is missing or invalid".

To resolve this error you need to complete the following steps:

Ensure that all users are logged out of Accountants Office and that you have a backup of your data before performing the procedure. For more details on refer to

Backing up my AO Classic data
To delete the CADATA files

Close the error message if it is still present.

  1. Right click the Start button and select Open Windows Explore. Windows Explorer opens.

  2. Navigate to and open your Data folder. For example, MYOBAO\Data. The contents of the folder appear.

  3. Highlight the three files named, CADATA.DBC, CADATA.DCT and CADATA.DCX, and from the File menu, select Delete. The message "Are you sure you want to send these 3 items to the Recycle Bin?" appears.

    If file extensions aren't visible, these three files show as CADATA.

  4. Click Yes. The files are deleted and no longer appear in the folder.

To rename the report definition files

  1. Right click on the relevant file and select Rename. The file name becomes editable.

  2. Edit the name of the file to be reportdefinitions1 and press Enter. The file is renamed.

Repeat step 2 for all files named reportdefinitions, the extensions of the reportdefinitions files are .DBF, .FPT and .CDX

You can now log into the relevant modules in MYOB Accountants Office.