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Editorial Team
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Asked: 2026-05-31T09:58:42+00:00

I am developing a c# application and I get the following error at debug

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I am developing a c# application and I get the following error at debug runtime:

An unhandled exception of type ‘System.IO.FileNotFoundException’
occurred in Unknown Module.

Additional information: Could not load file or assembly
‘Autodesk.Navisworks.Timeliner.dll’ or one of its dependencies. The
specified module could not be found.

Autodesk.Navisworks.Timeliner.dll is in the debug folder of the application. I have repaired the .net framework (version 4) but it did not resolve it. Any ideas on how to resolve this issue? Thanks.

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1 Answer

  1. Editorial Team

    First check – is the working directory the directory that the application is running in:

    • Right-click on your project and select Properties.
    • Click the Debug tab.
    • Confirm that the Working directory is either empty or equal to the bin\debug directory.

    If this isn’t the problem, then ask if Autodesk.Navisworks.Timeliner.dll is requiring another DLL which is not there.
    If Timeliner.dll is not a .NET assembly, you can determine the required imports using the command utility DUMPBIN.

    dumpbin /imports Autodesk.Navisworks.Timeliner.dll

    If it is a .NET assembly, there are a number of tools that can check dependencies.

    Reflector has already been mentioned, and I use JustDecompile from Telerik.

    Also see this question

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