Is there any way to make my program move on with the next step

If all else fails, you could trap the exception, i.e. wrap the call within eval { ... } — Something like this 

my $foo;          # undefined
eval {
    $foo->url();  # would 'Can't call method "url" on an undefined val
+ue ...'
};
if ($@) {
    # ... handle the exception
    print "error: ...: $@\n";
}

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In reply to Re^3: WWW::Mechanize follow_link() crashes if no link is found by almut
in thread WWW::Mechanize follow_link() crashes if no link is found by venkatesan_G02

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