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Fixed in 2021.2.X



Found in



Issue ID




'ArgumentException: Value must be a Com object' when calling 'System.Runtime.InteropServices.Marshal.FinalReleaseComObject'



How to reproduce:
1. Open the user's attached project ""
2. Enter the Play Mode
3. Open any file with the file picker

Expected results: No errors in the Console window
Actual results: "ArgumentException: Value must be a Com object." error in the Console window

Reproducible with: 2021.2.0b7, 2022.1.0a7
Not reproducible with: 2019.4.30f1, 2020.3.17f1, 2021.1.18f1, 2021.2.0b6

  1. Resolution Note (fix version 2021.2):

    Fixed in 2022.1.0a12

    Bugfix applied to our version of Mono.
    The Ookii.Dialogs library requires some basic COM Interop calls to work properly. With a recent update to our version of Mono, COM calls were disabled on all platforms. This patch of Mono will re-enable basic COM calls for the Windows platform.

  2. Resolution Note (fix version 2021.2):

    Fixed in 2021.2.0b16

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