Why is Visual Studio 2010 not able to find open PDB files

Question

I am trying to use OpenCV in VS 2010  I am an amateur  and I am learning first steps from the OpenCV wiki  However  when trying to debug my project  I get the following errors       C  Windows SysWOW64 ntdll dll   Cannot find or open the PDB file    C  Windows SysWOW64 kernel32 dll   Cannot find or open the PDB file    C  Windows SysWOW64 kernellbase dll   Cannot find or open the PDB file   I have those files in the right directory  so why can t it open them  What should I do to fix the problem

User · Answer

Had the same problem here but a different solution worked.

First, I tried the following, none of which worked:

Load symbols as suggested by seanlitow
Remove/Add reference to PresentationFramework and PresentationCore
Restart system

The solution was to undo the last few changes I had made to my code. I had just added a couple radio buttons and event handlers for checked and unchecked events. After removing my recent changes everything compiled. I then added my exact changes back and everything compiled properly. I don't understand why this worked - only thing I can think of is a problem with my VS Solution. Anyway, if none of the other suggestions work, you might try reverting back your most recent changes. NOTE: if you close & re-open Visual Studio your undo history is lost.. so you might try this before you close VS.

User · Answer

For VS2013 users who find themselves here as I did   Tools - gt  Options - gt  Debugging - gt  Symbols   You ll see that the Cache symbols in this directory  field is empty  you can either browse enter the path yourself or just go ahead and click the Load all symbols button   An alert window will appear saying  Since you haven t selected a symbol-cache directory the default will be used    You ll now see C  Users XXXX AppData Local Temp SymbolCache in the previously empty path-field   Click Load all symbols a second time and you should be set   Hit ok  and just for the sake of diligence  clean and rebuild your solution

User · Answer

I had the same problem  It turns out that  compiling a project I got from someone else  I haven t set the correct StartUp project  right click on the desired startup project in the solution explorer and pick  set as StartUp Project    Maybe this will help  cheers

User · Answer

I ve found that these errors sometimes are from lack of permissions when compiling a project - so I run as administrator to get it to work properly

User · Answer

Referring to the first thread   another possibility VS cant open or find pdb file of the process is when you have your executable running in the background   I was working with mpiexec and ran into this issue  Always check your task manager and kill any exec process that your gonna build in your project  Once I did that  it debugged or built fine    Also  if you try to continue with the warning   the breakpoints would not be hit and it would not have the current executable

User · Answer

Visual Studio Community Edition 2015  Been having this error all day  I finally fixed it by going to Tools Import and Export Settings  Reset all options   Reset General Settings   Once it s reset go to Tools Options Debugging Symbols  -- Then Check the box next to Microsoft Symbol Servers   Run your app in debug mode  and it will open up windows saying it s downloading Symbols for a bunch of different  dll files  Let it finish doing this   Once it completes  it should work again

User · Answer

First change the following parameters   Tools -  Options -  Debugging -  Symbols -  Server -  Yes  Then press Ctrl F5 and you will see amazing things

User · Answer

I ran into the same issue  When I ran my Unit Test on C   code  I got an error that said  Cannot find or open the PDB file    Logs  When I looked at the Output log in Visual Studio  I saw that it was looking in the wrong folder  I had renamed the WinUnit folder  but something in the WinUnit code was looking for the PDB file using the old folder name  I guess they hard-coded it   Found the Problem  When I first downloaded and unzipped the WinUnit files  the main folder was called  WinUnit-1 2 0909 1   After I unzipped the file  I renamed the folder to  WinUnit  since it s easier to type during Visual Studio project setup  But apparently this broke the ability to find the PDB file  even though I setup everything according to the WinUnit documentation   My Fix  I changed the folder name back to the original  and it works   Weird

User · Answer

I m having the same warnings  I m not sure it s a matter of 32 vs 64 bits  Just loaded the new symbols and some problems were solved  but the ones regarding OpenCV still persist  This is an extract of the output with solved vs unsolved issue       OpenCV helloworld exe   Loaded    C  OpenCV2 2 bin opencv imgproc220d dll   Cannot find or open the PDB   file       OpenCV helloworld exe   Loaded  C  WINDOWS system32 imm32 dll     Symbols loaded  source information stripped     The code is exiting 0 in case someone will ask      The program   4424  OpenCV helloworld exe  Native  has exited with   code 0  0x0

User · Answer

I had the same problem   Debugging does not work with the stuff that comes with the OpenCV executable   you have to build your own binarys  Then enable Microsoft Symbol Servers in Debug- options and settings- debug- symbols

User · Answer

I m pretty sure those are warnings  not errors  Your project should still run just fine   However  since you should always try to fix compiler warnings  let s see what we can discover  I m not at all familiar with OpenCV  and you don t link to the wiki tutorial that you re following  But it looks to me like the problem is that you re running a 64-bit version of Windows  as evidenced by the  SysWOW64  folder in the path to the DLL files   but the OpenCV stuff that you re trying is built for a 32-bit platform  So you might need to rebuild the project using CMake  as explained here   More specifically  the files that are listed are Windows system files  PDB files contain debugging information that Visual Studio uses to allow you to step into and debug compiled code  You don t actually need the PDB files for system libraries to be able to debug your own code  But if you want  you can download the symbols for the system libraries as well  Go to the  Debug  menu  click on  Options and Settings   and scroll down the listbox on the right until you see  Enable source server support   Make sure that option is checked  Then  in the treeview to the left  click on  Symbols   and make sure that the  Microsoft Symbol Servers  option is selected  Click OK to dismiss the dialog  and then try rebuilding

[visual-studio] Why is Visual Studio 2010 not able to find/open PDB files?

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