Thanks very much, it looks like that was the problem after all. I translated the command sent to the flow meter to hex and set the 'Hex' option to 'true' on the comport. The output then came out as hex so I just added an object to convert it back to an ascii string, works like a charm.

I've run into an issue with the setup of a com port that I'm using to communicate with an RS232 flow meter. I can receive data from the flow meter via FlowStone using 13 (carriage return) as my RxTerminator. The problem is that when I try to send using the same com port setup, I get no return ...