Maybe this is a FAQ, but I can't find it in perlfaq8, or here on perlmonks. On Linux, I call a matlab script from Perl: 
  1. $matlab_cmd_str = "$path_to_matlab -nodesktop -r my_script";
  2. open(RUN_MATLAB, "$matlab_cmd_str |") 
        or die("Can't run $matlab_cmd_str: $!\n");
  3. while(<RUN_MATLAB>) {
  4.   print FH "$_";
  5. }
  6. my $return_status = close(RUN_MATLAB);
  7. unless($return_status) { print STDERR "There was a problem: $?\n"
+}

[download]

Output sent to the matlab command window is captured to a file. Execution does not get to line 7 until the exit at the end of the matlab script is reached.

However, when I run this on WinXP, the code immediately executes to line 7, instead of waiting until the matlab script completes execution.

I get similar behavior when I replace the piped open with a 

  $sts = system($matlab_cmd_str);

[download]
or with a 
  my $stdout = qx/$matlab_cmd_str/;

[download]
Is there a way of getting the Linux-like behavior on WinXP, so execution of the Perl script pauses until the matlab script completes?

In reply to Problem invoking Matlab from Perl: works on Linux, fails on Windows by jim99

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.