I have DMC 4080 running 1.2b firmware with GalilTools 1.6.3.540 on ubuntu 12.04. Ethernet comm.

During typical run time I load two dmc files using a C++ application. One of which has a loop running on a thread that I start from c++ command call.

Occasionally, the controller enters an unusual state where some of the DMC functions are not available from c++ app or in the galil terminal. For example 'RS' returns

"2010 COMMAND ERROR. Galil::command("RS") got ? instead of : response. TC1 returned "14 Checksum error"

Also 'LV' returns many lines like this:

= 0.0000
= 0.0000
= 0.0000
...
= 0.0000
= 0.0000
= 0.0000

Power cycle of the controller does not clean up the problem.

Any idea what is happening?

Thanks
Marcin