Hi All during updating svn I made an error so there is old, corrupted version of r.stream.order. Tomorow (about 12AM CET) I will update it in svn repository. If someone need good version now, I suggest change change line 305 of io.c: from: sprintf(out_table,"%s",in_table) to: out_table=in_table; it shall help I apologies for problems. Jarek