GLSU Excel add-in fails to load after Office update from Version 2607 to 2608
Our Excel add-in, Process Runner GLSU , fails to load after Microsoft Office updates from Version 2607 to Version 2608. This started August 17, 2026 and is actively growing in scope. Error messages: Excel: Cannot run the macro 'onLoad' VBA: System Error &H80004005 (-2147467259). Unspecified error VBA: Compile error in hidden module: ThisWorkbook Has anyone encountered similar issue with their own custom add-on. If yes, any pointers to fix it. We are seeking help on priority. Thanks, Vrushali Pawale, Sr. Manager, Insightsoftware.
Excel Copilot fails when local workbook filename contains #
Excel Copilot does not work with locally stored workbooks whose filename contains the '#' character. The same workbook works correctly after renaming the file to remove '#'. The same workbook also works when stored on OneDrive with '#' in the filename. The issue appears specific to local files and filename parsing. Specifically, when clicking on Copilot in Excel, Copilot says "This file type is not supported for editing with Copilot. Please save this file as a modern file format, such as ".xlsx", to be able to edit it with Copilot." Interestingly, Copilot works fine if the Excel file name contains, for example, % or &, the problem only occurs if the name contains #. We suspect this is a bug. In our workflows, we work a lot with files that have # in their names and we would be very happy if this was indeed a bug and if it was fixed. Tnx.
