Cheers, this is the top of the script (/avprog/bin/alerting_map_all.pl) that is run: 
#!/usr/bin/perl
use strict;
use warnings;
use Getopt::Long;
use Avbrief::AlertingMap;
use Avbrief::ProcControl;
use Avbrief::DataLayer::CDBI::map_mainframe;
use File::Basename;
print "start of script";
die "this script must be run as 'abl'\n" unless ('abl' eq getpwuid($<)
+);

my $logpath = "/var/log/avbrief/".basename($0).".log";
my $timeout = (10 * 60);

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When it's run, I get the errors before the output of the print. 
# sudo -u abl   /avprog/bin/alerting_map_all.pl
Unable to recognise encoding of this document at /usr/share/perl5/XML/
+SAX/PurePerl/EncodingDetect.pm line 100.
Undefined subroutine &Proj::proj_init_plus called at /usr/share/perl5/
+Avbrief/Projection.pm line 89.
.
.
.
Undefined subroutine &Proj::proj_init_plus called at /usr/share/perl5/
+Avbrief/Projection.pm line 89.
start of script

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Which to me looks like the XML issue is not a script problem but a config/environment problem. Really confused now!!

In /usr/lib/perl5/PDL/GIS/Proj.pm is the following comment that lead to mention of proj_init_plus 
=head2 1.10 (23 April 2003) Judd Taylor
     - Changed from using the proj_init() type API in projects.h to th
+e
     - proj_init_plus() API in proj_api.h. The old one was not that st
+able...

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/usr/include/proj_api.h 
projPJ pj_init(int, char **);
projPJ pj_init_plus(const char *)

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In reply to Re^2: SAX and PDL probs by martinm
in thread SAX and PDL probs by martinm

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