Interface in uvm_test

In reply to DV intern:

The first argument to $assertoff is a numeric level, and the second argument is a scope. A virtual interface variable is not a scope.

I suggest you create a function inside your interface that you can call via a virtual interface handle.

interface bus;

cssss: assert property(....);

function void cssss_off;
   $assertoff(0,cssss);
endfunction

endinterface