Forum Discussion
walkerstoo
May 26, 2019Copper Contributor
Excell file will not open
Excel Office 365 (older files) will no longer open All have the .xlsx extension I get error message" that the file format or extension is not valid or file is corrupt" What can I do to resolve...
Detlef_Lewin
May 26, 2019Silver Contributor
It usually works if you close Excel and start again.
Note: Check the task manager (process tab) to verify that Excel (and Microsoft.Mashup processes) are really closed.