I switched to IPC::Run but has not faired any better. I keep getting a premature end error even though there is input data. Here is the relevent code segment I have now after many various iterations: 
my $h=start(\@cmd,\$in,\$out,\$err);
                while (!eof(FILELIST)) {
                        $thisline=readline(FILELIST);
                        ($thisfile,$thisfilesize)=split(/\t/,$thisline
+);
                        $in="$thisfile\n";
                        $h->pump;
                        while ($h->pumpable) {
                                $h->pump;
                        }
                        if (length($out)>0) {
                                putmsg($out);
                        }
                        $total+=$thisfilesize;
                        $complete=sprintf("%.2f",$total/$dumpsize);
                        putmsg("$complete%\n");
                }
                finish $h;

[download]
In one of my iterations I avoided the premature end message however, the script simply quits on the first call of 'pump'. No error message, nothing. Does anyone one see anything obvious? Thanks.

In reply to Re^2: Setting up 2 way pipe for a command by gw1500se
in thread Setting up 2 way pipe for a command by gw1500se

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