External Interfaces/API Reference

mexSetTrapFlag

Control response of mexCallMATLAB to errors

Fortran Syntax

• subroutine mexSetTrapFlag(trapflag)
  integer*4 trapflag
  

Arguments

trapflag
   Control flag. Currently, the only legal values are:

0	On error, control returns to the MATLAB prompt.
1	On error, control returns to your MEX-file.

Description

Call mexSetTrapFlag to control the MATLAB response to errors in mexCallMATLAB.

If you do not call mexSetTrapFlag, then whenever MATLAB detects an error in a call to mexCallMATLAB, MATLAB automatically terminates the MEX-file and returns control to the MATLAB prompt. Calling mexSetTrapFlag with trapflag set to 0 is equivalent to not calling mexSetTrapFlag at all.

If you call mexSetTrapFlag and set the trapflag to 1, then whenever MATLAB detects an error in a call to mexCallMATLAB, MATLAB does not automatically terminate the MEX-file. Rather, MATLAB returns control to the line in the MEX-file immediately following the call to mexCallMATLAB. The MEX-file is then responsible for taking an appropriate response to the error.

See Also

mexAtExit, mexErrMsgTxt

mexPutVariable

mexUnlock