Dear all I am running an LCM model (MNL-RPL-LCM-LCRPL), I have a status quo and two other alternatives. so I added ASC with other attributes. but I got a singular matrix. |-> SAMPLE ;1-1872 $ |-> NLOGIT ;Lhs = Choice ;choices=type1,type2,type3 ; Rhs =fn,mhz,egh,si,ej,pr,asc ;LCM ;Pts=2 ;PDS=8 $ what should I do for resolving this? Thank you Mahsa