Hi Kaz,            I am unable to get the @{ } form to work when contains a regexp.For example when I run "echo 'foo' | txr test.txr -" with test.txr containing this code: @(bind rxtest #/foo/)@(output)@rxtest@(end)@{test rxtest}@(output)@test@(end) I get the following output & error: #/foo/txr: unhandled exception of type query-error:txr: (source location n/a) unsupported object in spec: rxtesttxr: run with --backtrace to enable backtraces