When a commercially procured tool fails, it is better to contact the vendor for support. Usually, there is a ticketing mechanism to report your problems.
You also need to be carefull with the scope. Make sure that you do not record more data then you need.
SimPowerSystem uses variable time-step which can lead to very small time-step and therefore a lot of sample. Fixing the sampling rate or the decimation of the scope helps to cope with memory problem. You can also limit the number of sample.