Unable to send rate multiplier to rate~ using send~ --- possible bug?

Thank for the reply. That's really good to know, but actually in the patch I was using the dens is called rateA so I've slightly confused the issue I'm afraid. By clearing up that this should work you've definitely helped - I just discovered the problem is that I was (I think) inadvertently sending rate~ some 0 signals. I'm adjusting it with techno~ and although it should only be sending signals between 1-12 it seems not to be the case as I get -1.IND if the connection is probed (see pic). I don't totally understand it, but [clip~ 1. 12.] before the rate~ multiplier seems to fix the issue.