Excel Not Responding

Excel is frequently giving a "not responding" message when Brian is processing any of several workbooks. He wonders about the best way to diagnose and correct such a problem.

There are a number of things that you could check, but rather than reinvent the wheel here, I'll simply provide some pointers to helpful information. The best place to check may actually be the Microsoft Knowledge Base:

https://support.microsoft.com/en-gb/kb/2758592

The article focuses primarily on elements external to what is in your workbook, each of which can affect how Excel works with your data.

Of course, the problem may be related to something else entirely. If the "not responding" message comes up when you are running a macro, it could be because of the macro itself. If that is the case, you'll want to dust off your debugging skills and figure out if you have a logic error in the macro that is causing it to go into an infinite loop. (What is an infinite loop? A series of steps repeated forever because the conditions that would stop the repetition naturally are never encountered.) If that is the case, you'll need to change the macro to make sure the infinite loop condition doesn't occur.

Of course, it could be that your macro is working as hard as it can and it just takes a long, long time. In cases like this, Excel seems to "turn off" foreground processing (what you see in the workbook) until the macro running in the background is finished.

One way to moderate this a bit is to place a DoEvents command in your macro code. This causes VBA to take a breath and execute any "events" that have built up while it was so busy running code that it ignored everything else. In other words, it causes VBA to allow Excel to "respond," so the "not responding" message doesn't appear.

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (13435) applies to Microsoft Excel 2007, 2010, 2013, 2016, 2019, Excel in Microsoft 365, and 2021.