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User DLL fails in Mathcad 12

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User DLL fails in Mathcad 12

Been writing user dll functions since Mathcad 8 or so -- more than ten years. Company is upgrading from 11 to 12 just now. A function that has worked fine for years now has the error, "agrument type not implemented." Anybody seen this or know how to fix it? Thanks!
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User DLL fails in Mathcad 12

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User DLL fails in Mathcad 12

Thanks for responding. As I said, I've been doing this for ten years and this exact same function worked in Mathcad 2000, Mathcad 2001, and Mathcad 11.

It appears to be a problem with Mathcad 12 only. We got rid of that version, installed Mathcad 13, and it works just fine.
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User DLL fails in Mathcad 12

I have more function's under 12.1 tested , I am MathCad 12.1 ( before 2k,11) user. I have my ovner and mathsoft examples with Visual C++ 6 + SP4 ( 36KB size ); and Visual 8 ( new MS Studio 2005, 66kB size DLL's ) compiled; first with the same error message; without trouble by addaption INFOFUNCTION and LP array structur's.
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