Symbol file not loading for debugging custom project in Visual Studio 2012

Question

I have a large solution in Visual Studio 2012 which consists of executables and class library projects. When debugging the application the breakpoints in one particular clas

Answer 1

I had a line like this in my debug window:

Symbols for the module 'MyModule.dll' were not loaded.

I removed the 'Optimize code' option in Project properties -> Build. And the error disappeared.

Answer 2

I had this issue , tried all the other solutions (it took 2 days !! I'm crying... !TWO DAYS!) But finally I realized that my file was registered in GAC, I removed it and the problem was resolved.

At the command prompt, type the following command:

gacutil –u <assembly name>

How to: Remove an Assembly from the Global Assembly Cache

Answer 3

I found that the project I was receiving the message about, was being optimized when built.

I went into the projects properties, Compile Tab, Advanced Compile Options... and unchecked the Enable Optimizations checkbox

Answer 4

This issue may be due to wrong reference of dlls used in project.

Delete obj and bin folders in current project and build project again.

Answer 5

For me it helped to use chkmatch tool and then just close and open visual studio, make clean and rebuild. Now my pdb gets also loaded. You can make sure it does, as Nanhydrin pointed out, from Debug -> Windows -> Modules - this view is only accessible during debugging.

Answer 6

I just had this issue and thought I would put my fix here, as it my help others (maybe even myself again?!) in the future...

Make sure that when you are attaching to the process on the remote server, that the "Attach to" is set to

Automatically determine the type of code to debug

To do this, When the server qualifier has been provided and a list of processes is visible, click the "Select" button next to the "Attach to" input.

Then, select "Automatically determine the type of code to debug" and OK out of the screen, then attach.

This fixed the issue for me, at least.