Under the DOS shell, in the Perl directory, i entered "pp -h" but no documentation was found. there is a file named packer.pm that seems to describe these options and, yes, the -o always exists but T seems to be used to give the 'Temp cache name' (please note that i am a newbie in Perl) so i removed the line -T, included a linefeed after -o exiftool.exe (to see if the \r\n could create a problem). a file named 'a.exe' is created and the error message, when i launch a.exe is now: syntax error at script/pp_build_exe.args line 25, near "Image::ExifTool::ADCP -M "