Hi Federico,
your commit aae775859f54f84734ba2cfc2945c02c52b95e1f on 12 Nov 2014 added this condition
to ds_print_mi_list
if(attr == 0)
return -1;
attr will always be 0 on first pass. were you adding something above that set attr ?
as a result of this change, kamctl fifo ds_list will always fail.
cheers