Use of uninitialized value in concatenation (.) or string at C:/Perl/site/lib/PDL/IO/Pic.pm line 320.
Use of uninitialized value in pattern match (m//) at C:/Perl/site/lib/PDL/IO/Pic.pm line 321.
Oops, this is not a PNM fileconverter error:  at C:/Perl/site/lib/PDL/IO/Pnm.pm line 77