I quote from a message from Tech Support on the UFT-L@rootsweb.com, 27 September 1999.
This message was signed by Cheryl Bignami, Tech Support, The Learning Company
"How do I correct an "Error 41, memo file is missing or invalid" message?
"The fix depends on when you get the error message 41. If it's when you click on the icon and before a project opens, either go to the directory in DOS in which you have the program installed and type FIXME or run the FIXME.BAT file in that same directory using File Manager or Windows Explorer. Try starting the program again. You should be able to open the program without a project open. You'll get the 'advanced or normal editing more; message if you're using Ultimate Family Tree 2.0 or ROOTS V.
"If the problem exists when you try to open your project, it might be a damaged control file for the project. To fix this, you simply need to get a good memo file and copy over the bad one. To do this, you can use the one provided in the Kennedy sample project.
"As an examplt, let's say your project is called SMITH.PRO and is located in the UFTPROJECTS directory. The KENNEDY.PRO file is in the UFTSAMPLE directory. Go to any DOS prompt and type the following:
CDUFTSAMPLE COPY KENNEDY.FPTUFTPROJECTSSMITH.FPT
"You'll get a message asking if you want to overwrite the existing SMITH.FPT file. Choose Yes. You should now be able to get into your project. ------
The Knowledge Base not only gives the above information, it also suggests"
Question: During a Pack I got "Error 41, memo file is missing or invalid". What does this mean?
Answer: One of the project or library memo files may be damaged. Restore from a recent backup. If no recent backup, make a current backup and then try creating a duplicate project. To create a duplicate project, from the File menu, choose Save As. Select Ultimate Family Tree Project as the File type. Enter a new name in the file name field and choose OK. If neither of these work, contact Technical Support.