I guess it's a case of 'once bitten, twice shy'...

When I was using Expect to control an interactive command process, it occasionally got out of sync - I would send a command, get a truncated response, send another command and get the previous response in full. This was not a timeout or prompt-matching issue. But since replacing Expect with Net::Telnet I have had no problems (famous last words!).

Maybe it didn't like DEC Compaq HP Tru64 UNIX or DEC AlphaServer hardware?

JJ