It allows you to view information about code running inside the .NET Common Language Runtime (CLR), such as the managed heap and internal data types .

Could you clarify or what software you were using when it appeared? How to best distribute DLL (addin) to Solid Edge users

You typically use it by loading it into WinDbg or Visual Studio . Troubleshooting Steps If you are seeing an error message for Simplix_sot.dll :

Right-click the file (if you can find it) and select Properties . Check the "Digital Signatures" tab to see the verified developer.

"Simplix" is a well-known third-party tool (the Simplix Update Pack ) used to integrate updates into Windows 7 or Windows 10/11 installations.

Verify the exact characters. Check if it might be Simplex , Simplix , or even a part of a Solid Edge add-in (which often uses custom .dll files) .

Since the name is non-standard, use a tool like Malwarebytes to ensure it isn't a malicious file masquerading as a system component.

However, it is highly likely you are looking for one of the following: 1.