System console closes channel

[Altera_Forum]

I have a system console running to control my system via a Jtag -> Avalon MM Master, and it runs fine. But occasionally after I have configured my parameters and I try and read back some status it says "Channel closed". 

 In full: error: master_read_32: com.altera.systemconsole.core.services.ChannelClosedException: Channel closed while executing "master_read_32 $jtag_master2 0x800 16"  Any clues? Is this normal? Is something else interfering? Would an OpenCore Plus license being managed using the same USB-Blaster->Jtag connection interfere?  Struggling to find a reason.  The core that was configured still runs though, so it's not reset things or similar.

[Altera_Forum]

same here. any thoughts?

[PareshKJoshi]

Try by reducing the jtag speed..
Reducing the jtag speed worked for us.

For example : With only 1 single USB blasterII plugged this will be, to make jtag Frequency 6MHz.

>jtagconfig --setparam 1 JtagClock 6M  

Paresh K. Joshi

=============