Failed to upgrade RouterOS on RB2011UAS-2HnD-IN

Hello,

I have one Mikrotik RB2011UAS-2HnD-IN and it is working fine with RouterOS 5.25. When i want to upgrade to 6.x it is crashing after a few minutes. It is simple became unresponsive.

Tomorrow morning i need to go where the router is located and see if i can generate the support.rif.

Did anyone else had this problem with this model ?

Thanks in advance,
Andrei