I'm doing some embedded assembler work and using Visual C++ 6.0's NMAKE.EXE to "build" the project. I want to be able to call NMAKE as a tool and have the output redirected to a new window. NMAKE calls the A51.EXE 8xC51 assembler (an old typical 16-bit DOS program.)

When I try to do this I get about four errors as follows:

16-bit MS-DOS Subsystem - NTVDM has encoutered a System Error - Access is denied, with the choices to Terminate or Ignore. If I choose Ignore about four times my window opens and all of the output that I expect to see is there. Apparently a harmless but annoying and anti-productive error message. Can I circumvent this in any way? .. and why is it happening?

Corey Stinson

I guess that 16-bit program may have problems with NTFS file permision??? Source code of GTECAP32.EXE (program which GWD Text Editor use to redirect stdin and stderr to a temporary file) is very simple:

/******************************************************
  Syntax: GTECAP32.EXE CaptureFile Program [Options..]
          will execute
       Program [Options...] > File
*******************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <process.h>

int main(int argc, char *argv[], char *env[])
{
   FILE   *fpStdout, *fpStderr;
   int    i;
   char   *new_argv[256];

   if (argc < 3)
      return 1;

   fpStdout = freopen(argv[1], "w", stdout);
   fpStderr = freopen(argv[1], "w", stderr);

   new_argv[0] = argv[0];
   for (i = 3; i < argc; ++i)
   {
      new_argv[i-2] = argv[i];
   }
   new_argv[i-2] = NULL;
   spawnvp(P_WAIT, argv[2], new_argv);

   fclose(fpStdout);
   fclose(fpStderr);

   return 0;
}