What is Runtime Error 1004 in Excel? Runtime error 1004 is an error code relating to Microsoft Visual Basic that has been known to disturb Microsoft Excel users.

Sometime in the past few hours, Microsoft posted official warnings about an 'invalid procedure call error' associated with August patches for all versions of Windows, from Win7 onward, and ...

Microsoft's Excel team takes to Reddit to answer questions and reassure users that yes, you can open up more than one Excel window at the same time.