Dear expert SDM users, 
I am trying to conduct a meta-analysis with SDM 6.21 on a Macbook, using fMRI studies of activation, with one sample.
After preprocessing, I launch the mean analysis as explained in SDM tutorial, but the following message appears, (please see file attached) interrupting the process suddenly. 
Actually, the file doesn't exist. However, as I understood from, the file mentioned was not supposed to be an output from pre-processing.
I suppose that the problem could be the file "sdmpsi_params.xml", but how can I check his integrity? 

I would be infinitely grateful if anyone could help me. 
Kind regards, 
Giulia.