Forum Discussion
Elvis-19
Jul 22, 2026Copper Contributor
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 wo...
Elvis-19
Jul 23, 2026Copper Contributor
Thanks to everyone for the answer.
We are aware of the full operability of using Copilot, which is enabled by MS cloud services, and we are also aware of the problems that may arise due to the use of the # character, which is interpreted by various programs for other purposes.
Regardless, we have already reported the bug to MS support. Namely, the use of the # character in file names is not prohibited by MS, unlike some other characters or words (COM, a dot at the end of the name, a space at the end of the name, etc.).