problems with sm upgrade using CNUT

Good Day guys

i have a pair of ap and sm both are in the 4.2, since i wnated to use the vlan i needed to upgrade it to 7.1 was able to do so with the ap but having problems with the sm. the problem is failed in loading the package, both are pluged in my computer (double lan)

inaki

Did you upgrade sequentially (eg. 4.2 --> 6.1 --> 7.0 etc) or just straight from 4.2 to 7.1?