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I came across the COM error:
Invalid parameter error. HRESULT 0x80030057 (STG_E_INVALIDPARAMETER)
when dealing with an Excel interop component called Aspose and couldn’t figure out why this error when opening an Excel file. Nor could I find anything here on Stack Overflow so it MUST be asked:
What is the most common cause of this error (in any printed representation) from some black-box COM component?
I will also post what caused my error when SO allows me to!
In my case the cause was that I had targeted my C#.NET app that was interacting with a wrapped COM component (Aspose Excel 2.9.2) to run on “any CPU” platform. This is no good as the DLL was compiled explicitly for 32-bit platforms only. So my C#.NET app had to be platform targeted explicitly to “x86”.
I’m not sure if this would be the most common though, but it’s a pretty well obscured problem for that error message.