An unhandled Microsoft .NET Framework exception occurred in mtm.exe [4560]
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(57.599999999999994, 28.999999999999996%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPN%3C/text%3E%3C/svg%3E)
Pavol Nosko
1
Reputation point
An unhandled Microsoft .NET Framework exception occurred in mtm.exe [4560] wtf?
Windows development | Internet Information Services
{count} votes
-
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(80, 82%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBZ%3C/text%3E%3C/svg%3E)
Bruce Zhang-MSFT 3,771 Reputation points2022-02-21T03:26:41.287+00:00 Hi @Pavol Nosko ,
Based on the existing exception prompts, I can't figure out what the specific error is. The most likely cause though is catching the StackOverflowException object in the try/catch block, which by default kills the w3wp.exe process. So please check your try/catch code. Other causes that can also cause this problem are circular references in the code.
So I recommend you to check the event information in the event viewer or use the debugdiag tool to grab the dump file. Getting more accurate error information can help you locate the problem faster.
Sign in to comment
Sign in to answer