I have version 2018d Windows 64-bit. I try to generate random numbers using the "Random variable..." command in the Add menu and I get <<'U1' -- no numeric conversion performed!>> In script mode, the command series U1 = randgen(U1,0,1) works fine. -- Alecos Papadopoulos PhD Athens University of Economics and Business, Greece School of Economic Sciences Department of Economics web: alecospapadopoulos.wordpress.com/