I am using ISO8583 Sampler in JMeter for Sending ISO Messages, I need to append the length in in hex of the total message divide by 2 at the beginning. I have read the documentation and i cannot find anything.
Question is, why do you need to manually perform that?
I believe you just need to select the proper channel in the connection configuration.
Depending on what you mean by "in hex" maybe HEXChannel
which sends four ASCII bytes with the hex character or NACChannel
which will send 2 bytes with the length, some people incorrectly call that hex when they are actually just 2 raw bytes.