Added Carp::Always as suggested.

It doesn't appear to have given anything more

main::(test-salesforce-03-cpan.pl:7):
7:      my $uid = 'uid@domain.trial.sandbox1';

  DB<1> c
Incorrect parameter at c:/Perl64/site/lib/SOAP/Lite.pm line 1993.
        SOAP::SOM::_traverse('SOAP::SOM=HASH(0x4960d10)', 'ARRAY(0x495
+e8e8)', 10, '', 'loginResponse
', 'result', 'sessionId') called at c:/Perl64/site/lib/SOAP/Lite.pm li
+ne 2037
        SOAP::SOM::_traverse_tree('SOAP::SOM=HASH(0x4960d10)', 'ARRAY(
+0x495e1a8)', '', 'loginRespons
e', 'result', 'sessionId') called at c:/Perl64/site/lib/SOAP/Lite.pm l
+ine 2025
        SOAP::SOM::_traverse('SOAP::SOM=HASH(0x4960d10)', 'ARRAY(0x495
+e1d8)', 5, '', 'loginResponse'
, 'result', 'sessionId') called at c:/Perl64/site/lib/SOAP/Lite.pm lin
+e 2037
        SOAP::SOM::_traverse_tree('SOAP::SOM=HASH(0x4960d10)', 'ARRAY(
+0x495db60)', '', 'loginRespons
e', 'result', 'sessionId') called at c:/Perl64/site/lib/SOAP/Lite.pm l
+ine 2025
        SOAP::SOM::_traverse('SOAP::SOM=HASH(0x4960d10)', 'ARRAY(0x495
+de78)', 1, '', 'loginResponse'
, 'result', 'sessionId') called at c:/Perl64/site/lib/SOAP/Lite.pm lin
+e 2037
        SOAP::SOM::_traverse_tree('SOAP::SOM=HASH(0x4960d10)', 'ARRAY(
+0x495ed20)', '', 'loginRespons
e', 'result', 'sessionId') called at c:/Perl64/site/lib/SOAP/Lite.pm l
+ine 2025
        SOAP::SOM::_traverse('SOAP::SOM=HASH(0x4960d10)', 'ARRAY(0x495
+dde8)', 1, '', 'loginResponse'
, 'result', 'sessionId') called at c:/Perl64/site/lib/SOAP/Lite.pm lin
+e 2037
        SOAP::SOM::_traverse_tree('SOAP::SOM=HASH(0x4960d10)', 'ARRAY(
+0x495eb28)', '', 'loginRespons
e', 'result', 'sessionId') called at c:/Perl64/site/lib/SOAP/Lite.pm l
+ine 2025
        SOAP::SOM::_traverse('SOAP::SOM=HASH(0x4960d10)', 'ARRAY(0x495
+dc50)', 1, '', 'loginResponse'
, 'result', 'sessionId') called at c:/Perl64/site/lib/SOAP/Lite.pm lin
+e 2037
        SOAP::SOM::_traverse_tree('SOAP::SOM=HASH(0x4960d10)', 'ARRAY(
+0x495ee40)', '', 'loginRespons
e', 'result', 'sessionId') called at c:/Perl64/site/lib/SOAP/Lite.pm l
+ine 2025
        SOAP::SOM::_traverse('SOAP::SOM=HASH(0x4960d10)', 'ARRAY(0x495
+dd58)', 1, '', 'loginResponse'
, 'result', 'sessionId') called at c:/Perl64/site/lib/SOAP/Lite.pm lin
+e 1985
        SOAP::SOM::match('SOAP::SOM=HASH(0x4960d10)', '//loginResponse
+/result/sessionId') called at
c:/Perl64/site/lib/SOAP/Lite.pm line 1910
        SOAP::SOM::valueof('SOAP::SOM=HASH(0x4960d10)', '//loginRespon
+se/result/sessionId') called a
t c:/Perl64/site/lib/WWW/Salesforce.pm line 505
        WWW::Salesforce::login('WWW::Salesforce::Simple', 'username', 
+'uid@domain.trial.sandbox
1', 'password', 'passwordtoken') called at c:/Perl64/site/lib/WWW/Sale
+sforce/S
imple.pm line 19
        WWW::Salesforce::Simple::new('WWW::Salesforce::Simple', 'usern
+ame', 'uid@domain.trial.s
andbox1', 'password', 'passwordtoken') called at test-salesforce-03-cp
+an.pl li
ne 17
Debugged program terminated.  Use q to quit or R to restart,
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