I would like to call the following function from Mathematica

PICO_STATUS ps3000aOpenUnit
   short * handle,
   char * serial

I define the DLLFunciton in Mathematica:

ps3000OpenUnit =  DefineDLLFunction["ps3000aOpenUnit", "PS3000a.dll", "short", {"short[]", "char[]"}]

I get following error when executing

ps3000OpenUnit[handle, serial]
NET::methodargs: Improper arguments supplied for method named ps3000aOpenUnit.

What is wrong with my code?

Thanx for helping me in advance.

  • $\begingroup$ I don't recall "short" or "char" being a valid type for the definition - shouldn't they be "integer" and "string" (or "char*"? $\endgroup$
    – ciao
    Commented Jun 5, 2014 at 7:52
  • $\begingroup$ It seems like your function signature declares your parameters as pointers, but in your DefineDLLFunction you specify arrays. What are the values of handle and serial? $\endgroup$
    – mfvonh
    Commented Jun 5, 2014 at 14:03

1 Answer 1


"short" or "char" are in the C programming language data typs.

Try this:

ps3000aOpenUnit = 
  DefineDLLFunction["ps3000aOpenUnit", "ps3000a.dll", "short", {"short*"}];

status = ps3000aOpenUnit[handle];
  • $\begingroup$ I tried this. However I am getting an error. NET::netexcptn: A .NET exception occurred: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. at Wolfram.NETLink.DynamicDLLNamespace.DLLWrapper1.ps3000aOpenUnit(Int16& ). any suggestions? Tnx! $\endgroup$
    – Jozef
    Commented Mar 4, 2016 at 11:36

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