You need to stick some delimeters in your output. The code

my ($num1,$num2) = (3, 24);
print "$num1$num2\n";
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will output the number 324. You're doing something similar with your pipe. Sitck an endline in the print statement in parent,

print $pipe "$in\n"
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so that the line-at-a-time read in the child works properly.

Ron Steinke rsteinke@w-link.net