Thank you for your reply, sundialsvc4.

Yes, this is the sort of thing I'm doing now.

start "01" cmd /c perl CountFilesRecords.pl "ABCD/foo bar/"A*/Z* 1^> 0
+1.csv 2^> 01.txt
start "02" cmd /c perl CountFilesRecords.pl "ABCD/foo bar/"B*/Z* 1^> 0
+2.csv 2^> 02.txt
start "03" cmd /c perl CountFilesRecords.pl "ABCD/foo bar/"C*/Z* 1^> 0
+3.csv 2^> 03.txt
start "04" cmd /c perl CountFilesRecords.pl "ABCD/foo bar/"D*/Z* 1^> 0
+4.csv 2^> 04.txt
start "05" cmd /c perl CountFilesRecords.pl "ABCD/foo bar/"E*/Z* 1^> 0
+5.csv 2^> 05.txt
start "06" cmd /c perl CountFilesRecords.pl "ABCD/foo bar/"F*/Z* 1^> 0
+6.csv 2^> 06.txt
start "07" cmd /c perl CountFilesRecords.pl "ABCD/foo bar/"G*/Z* 1^> 0
+7.csv 2^> 07.txt
start "08" cmd /c perl CountFilesRecords.pl "ABCD/foo bar/"H*/Z* 1^> 0
+8.csv 2^> 08.txt
start "09" cmd /c perl CountFilesRecords.pl "ABCD/foo bar/"I*/Z* 1^> 0
+9.csv 2^> 09.txt
start "10" cmd /c perl CountFilesRecords.pl "ABCD/foo bar/"J*/Z* 1^> 1
+0.csv 2^> 10.txt
[download]

Blech!

It's precisely what I want to automate using Perl. It seems to me the best way to solve the problem is to add parallel processing of the folders and files inside the counting Perl script itself.

There is a start(1, $cmd) in Windows which may be the answer you are looking for. See MS Forking Blues and How to skip to next Command line

---

I'm not really a human, but I play one on earth.
Old Perl Programmer Haiku ................... flash japh

Thanks again, zentara.

Ugh. The whole reason I chose to use Capture::Tiny (after much research) is because it purports to solve all the problems that all the other methods of forking and exec-ing on Windows do not. I read its author's presentation titled How (Not) to Capture Output in Perl.

I certainly hope I don't have to abandon using Capture::Tiny now. After all, it's working brilliantly. What's failing is something related to my use of Parallel::ForkManager.