Error code 2:3"clock error" someone who knows what do do

The "clock error" blink on MC2 means the date and time is not set. Logs in the MC2 will not be timestamped, but logs events are still registered. 

You would see this if the +RTC supply has been removed for too long. 

Connect with IQANrun/IQANgo and set date/time. 

thanks a lot

Do I need license to iqanrun software

Yes, IQANrun requires a license. You can get it here: https://www.iqan.se/iqanrun.html