On some platforms such as Windows where the fork() system call is not available, Perl can be built to emulate fork() at the interpreter level. While the emulation is designed to be as compatible as possible with the real fork() at the level of the Perl program, there are certain important differences that stem from the fact that all the pseudo child ``processes'' created this way live in the same real process as far as the operating system is concerned.

In short, YMMV. Make sure you have the latest perl ( >= 5.6.0 ) from ActiveState or whomever built your distribution.

HTH
--
idnopheq
Apply yourself to new problems without preparation, develop confidence in your ability to to meet situations as they arrise.

~ Shunryu Suzuki

Here is how I sometimes get around this problem.

for(;;) {
  do tcl stuff...

  seek
  read
  print
}
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