feature #647: If the column does not exists using the -l option show an error

src/cli/cli_helper.rb

@@ -192,8 +192,7 @@ module CLIHelper
                 size=@columns[field][:size]
                 return "%#{minus}#{size}.#{size}s" % [ data.to_s ]
             else
-                puts "Column not defined"
-                exit -1
+                exit -1, "Column not defined"
             end
         end
 

src/cli/command_parser.rb

@@ -169,13 +169,7 @@ EOT
             if comm
                 check_args!(comm_name, comm[:arity], comm[:args_format])
 
-                begin
-                    rc = comm[:proc].call
-                rescue Exception =>e
-                    puts e.message
-                    exit -1
-                end
-
+                rc = comm[:proc].call
                 if rc.instance_of?(Array)
                     puts rc[1]
                     exit rc.first