X series DAQmx Multi-Device task in PXIe chassis lock PXIe_Clk100 for counter measurement

Hi All

I'm facing the issue described in this topic :

http://forums.ni.com/t5/Multifunction-DAQ/how-do-I-synchronize-analog-and-counter-inputs-with-multiple-x/m-p/2835296 - M81895

When a multi-device AnalogInput task is running on my PXIe6341, I can't start a counter task measurment because the counter task wants to route the PXIe_clk100 to the Internal reference clock which is already locked by the muti-device task.

Is it possible to use counter inputs features on X series with multi-device task running? 

How to disable automatic routing when counter task starts?