Error when opening Excel Files (error description not available)

Hello everybody,

After the update to 25.3.14681.8, when opening Excel files the following error appears:



The details are:

CoMSExcelApplicationEventSink.cpp, 210, (error description not available) (0x800A03EC)
MSExcelApplication.cpp, 778, (error description not available) (0x800A03EC)
MSExcelApplication.cpp, 1512, (error description not available) (0x800A03EC)
MSExcelApplication.cpp, 2112, (error description not available) (0x800A03EC)
(M-Files 25.3.14681.8 2025-04-16T09:51:08.879Z)

We noticed that:
- This happens with both "Read-Only" or "Check-Out" options;
- This does not happen when opening with the previously used version (25.2.14524.3)
- This only happens with Excel files which have references to M-Files properties.

What we tried that worked:
- Creating a new Excel file with the updated M-Files version, inserting the property reference, checking-in. This seems to allow for the file to be opened in the new version.

The issue with the solution we have is that the Vault has way too many files to be manually updated that way.

What can we do to solve this? It seems that right now the only thing we can do is try to revert to a previous M-Files version.