diff -r 7ccc679ac5db -r 2d41fac09084 lib/Quancom/Result.pm
--- a/lib/Quancom/Result.pm	Mon Jan 05 21:44:56 2009 +0100
+++ b/lib/Quancom/Result.pm	Tue Jan 06 02:01:26 2009 +0100
@@ -27,7 +27,8 @@
     $r =~ s/\s*$//;    # should match any \r or \n too
 
     # decode the status
-    if (($self->{error_code}) = $r =~ /^E(.)/) {
+    if ((my $e) = $r =~ /^E(.)/) {
+	$self->{error_code} = unpack("C", $e);
         $self->{ok} = 0;
     }
     elsif (my ($jobid, $data, $csum) = $r =~ /^[DO](..)(.*)(..)$/) {
@@ -62,8 +63,8 @@
 
     return undef if !@_ and $self->{ok};
 
-    return ("checksum error", "character error", "invalid command",
-        "invalid width")[ @_ ? $_[0] : $self->{error_code} ];
+    return +("checksum error", "character error", "invalid command",
+        "invalid width")[ defined $_[0] ? $_[0] : $self->{error_code} ];
 }
 
 1;