search for: undefine_command

...to the response: argue that I really shouldn't want to do this, and suggestions on how or how not to accomplish it. Wrt the first -- I need to consider this more. You may convince me. Wrt th second: I don't know perl, but looked at Rdconv.pm. It looks like changing the line to $text= undefine_command($text, "dontrun") would do what I want; but that's a guess, and it would only change the local behavior I'll have to pull down R-devel to understand the tools::: comment. Yes, verbatim sections in Tex are subtle. Thanks for the input.