Hello Grass User's Intented used the comand i.group but appear the following: group1- does not exist, do you wish to create a new group? (y/n) [n] y sh: 2657 Memory fault - core dumped the memory have 18740 kbytes, why not function?? will thank for anyone help Zorka e-mail: viewps at llareta.dagh.uta.cl