I want to use rmdstestclient with topic including @ on the -f filename parameters
but rmdstestclient use only the front part @
do you have a method for read topic with @
What you have stated in your question does not appear to be a valid usage of rmdstestclient.
During the last month you did not have a chance to respond to us with the requested clarification.
We have tried to solicit further input from you, in an attempt to understand your use case for this very broad and versatile tool, which is intended for the consumption of RSSL and SSL content, and offers excessive number of command line options to define the parameters of thereof.
If you intend to consume a different format, as your question appears to imply, then rmdstestclient will not yield itself to your use case, you will need select a tool correlated to your format/protocol/content.