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Home/ Questions/Q 6685121
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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T05:01:19+00:00 2026-05-26T05:01:19+00:00

I was editing a VS 2010 Sequence Diagram and after saving and closing it,

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I was editing a VS 2010 Sequence Diagram and after saving and closing it, I can no longer open it. I get the following error. Anyone know how to resolve this?

“Cannot Load ‘{diagram path and name}’: Value cannot be null.
Parameter name: rolePlayer”

The title of the dialog is “Microsoft Visual Studio”

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  1. Editorial Team
    Editorial Team
    2026-05-26T05:01:20+00:00Added an answer on May 26, 2026 at 5:01 am

    This question was answered on the MSDN Visualization & Modeling Tools forum.

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