Hi,

I can't use any app in my excel, it says app error: It can't be open, either close or restart.

I have tried using activelic.bat , something I found in a different thread but doesn't work. Do you know why?

Thanks!!

Hi,

Do you mind sharing us more information? Which Windows operation system and Office do you use?

According to your description, I suppose this issue occurred with Windows 10 Technical Preview and Office 2016 Technical Preview. If yes, it seems a known issue, please see these similar issues:

https://social.technet.microsoft.com/Forums/en-US/7b46c1c9-70d8-4984-a300-179ed1344e87/cant-open-word-excel-and-powerpoint-preview-apps?forum=WinPreview2014General

http://answers.microsoft.com/en-us/insider/forum/insider_office-insider_word/this-app-cant-open-workaround/defcacc1-4890-45bc-a204-5f209a17c3e5

If I misunderstood something, please feel free let us know.

George Zhao
TechNet Community Support