Well, I didn't really solve it, as I still can't access it from multiple threads simultaneously. I made sure I only access it from one thread at a time (and generally - from one thread only, which is not the UI thread.)
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I want to output a part of the map's active view but without stopping the current UI thread. I'm using C# and ArcGIS 9.3.1 (sp1). I tried doing it in a background thread but this is the exception I get: COMException was unhandled: "The data necessary to complete this operation is not yet available. (Exception from HRESULT: 0x8000000A)" Is there a way of outputing a bitmap from the map in background?
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