Cannot step into the code while debugging a C DLL file in Visual Studio 2012

Question

I have a separate Visual Studio solution with the DLL written in C. I use it in another solution; in a console C++ project. While debugging the console project I step into a DLL function.

However, the page is opened reporting that There is no source code available for the current location with call stack location MyConsole.exe!_tailMerge_MyLibrary_dll() . I use delay loading of the DLL file in the console project. As the no source code page is displayed, I inspect the output window and find symbols loaded of the DLL line. Why does Visual Studio 2012 fail to step into this DLL code?

Answer 1

I had the same problem and the following solved mine. I set "Debugger Type" to "Mixed" on the properties page of the main project. My main project is managed code while the .dll is native.

Answer 2

It happens, when dealing with external projects that Visual Studio asks you if you have the code. If you cancel the process, the requested file gets added to a list in the solution and it remembers NOT to ask for the file again.

Check your Solution Property Pages > Debug Source Files . First, make sure your file is NOT in Do not look for these source files: and then make sure you add the location of the sources in the Directories containing source code . This should help fix the problem.