note GeneralElektrix Hi, <p>I need to share how I solved a similar problem with Package::Stash. Active Perl 5.10.1 Win32, mod_perl 2.0.4. It's a webapp using Template::Toolkit to render the user interface. I have the same "Free to wrong pool" message in Apache's error log.</p> <p>For example: <code>Free to wrong pool 2248d88 not 2264038 at X:/Path_to_Perl_site_lib/Package/Stash.pm line 40.</code>. Each one triggered an Apache restart like this: <code>[notice] Parent: child process exited with status 255 -- Restarting</code>.</p> <p>After a lot of research on Google and reading obscure posts about how Apache, mod_perl and XS manage threads on Win32, I went to Stash.pm and noticed it chooses between a Pure Perl and an XS implementation around line 24:</p> <code> for my $impl ('XS', 'PP') { if (eval "require Package::Stash::$impl; 1;") { $IMPLEMENTATION = $impl; last; } else { $err .= $@; } } </code> <p>I simply switched 'XS' and 'PP' around in this for loop and now it chooses the Pure Perl implementation first. Problem solved. I restarted Apache and the error log don't show the "Free to wrong pool" message anymore.</p> <p>Thanks to the monks who reported this problem here and helped me solve a similar issue!</p> 665353 665353