illegal initialization for parameter

[a710756]

hi, everyone

I want to control my motion card using dll in CVI,

But when I compile, it shows error:

"PS400.h"(520, 47) Illegal Initialization for parameter 'pAvailCards'.

  short __stdcall ps400_scan
    (
    short* pCardNum,         /* pointer to available PISO-PS400 cards */
  BYTE* pAvailCards = NULL /* pointer to available cards array */             <------error line
    );

Could someone help me to slove this problem?

Thanks.

PS:I have include "windows.h"

SCC

[jr_2005 · Accepted solution]

Just remove the "= NULL" from the prototype definition. This is a C++ feature which is not supported in CVI's ANSI C compiler.

JR

[a710756]

hi, JR

Thank you for your response.