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Visual Studio Profiler Says unable to find pdb files after collecting data with .nettrace

Ekrem Mujic 0 Reputation points
2026-02-17T21:36:48.5233333+00:00
  1. I collected the traces with .nettrace from the remote server including .dll and .pdb files
  2. Uploaded .nettrace file to the Visual Studio Profiler and set the path for the .dll and .pdb files in VS under Debug->Options->Symbols
  3. Selecting "Generate With Copilot" feature under "Top Insights" in VS Profiler returns errors that profiler was unable to find symbols therefore AI was unable to generate perf reports:

"Symbols failed to load for Autofac.dll. Failed to find symbol file Autofac.pdb

Symbols failed to load for System.Private.CoreLib.dll. Failed to find symbol file System.Private.CoreLib.pdb"

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Manually:

  1. Selecting one of the Hot Paths function names, it opens a new window and a pop up is displayed on the screen looking for symbols, after a few seconds it responds with the error in the log: "Symbols failed to load for Autofac.dll. Failed to find symbol file Autofac.pdb

Symbols failed to load for System.Private.CoreLib.dll. Failed to find symbol file System.Private.CoreLib.pdb

Symbols failed to load for System.Private.CoreLib.dll. Failed to find symbol file System.Private.CoreLib.pdb

Symbols failed to load for System.Private.CoreLib.dll. Failed to find symbol file System.Private.CoreLib.pdb"

  1. Unable to point to the code where perf issues are because it is unable to find/load symbols
  2. I tried it many different ways including following Microsoft docs with no luck Any help with this would be greatly appreciated.
Developer technologies | Visual Studio | Other
Developer technologies | Visual Studio | Other
A family of Microsoft suites of integrated development tools for building applications for Windows, the web, mobile devices and many other platforms. Miscellaneous topics that do not fit into specific categories.
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