"the fldigi problem is due to improper handling of exceptions in the area of the arq socket, the rig control socket, and the sound driver. ... I always get the freeze after a timeout of the software PTT command from rig control, or after a timeout of the sound driver on the IC7200." Couple of questions please: * What do you use to control your rig ? Hamlib ? * What is exactly the "sound driver on the IC7200" ? * Which kind of operations are occuring on the arq side when it happens ?