Dear Zaixu,

I may know what the problem is. When you specify the name of the log folder, it has to end with '/' on unix or Mac (or '\' on windows). A correct example is:

>> opt.path_logs = '/home/pbellec/svn/psom/trunk/data_demo/';



While the following example will result in the problem you describe:



>> opt.path_logs = '/home/pbellec/svn/psom/trunk/data_demo';



This is not exactly a bug, but certainly qualifies for annoying behavior. In the next release of PSOM (coming out really really soon), the final '/' will be automatically added if missing.



Please let me know if I guessed correctly.



Best regards,



Pierre