R help - May 2007 - Error in dimnames(x) <- dn

Hi everyone,

I import data from access, and make an object (c) store the data,
when I want to use it in function mnp, it gives the below error:

Error in dimnames(x) <- dn : length of 'dimnames' [2] not equal to
array
extent
> x<-odbcConnectAccess("db2.mdb")
> c<-sqlFetch(x,"Sheet2")
> odbcClose(x)
> c
    choice     clio    punto     polo
1        3 10.08163 10.05406 10.07323
2        1 10.08163 10.05406 10.07323
3        2 10.08163 10.05406 10.07323
4        1 10.08163 10.05406 10.07323
5        2 10.08163 10.05406 10.07323
.........and 607 more
> res1 <- mnp(choice ~ 1, choiceX = list(Clio= clio, Punto= punto,
Polopolo), cXnames = "price", data = c, n.draws = 100, verbose = TRUE)
  Error in dimnames(x) <- dn : length of 'dimnames' [2] not equal to
array
extent

clio, punto and polo are the x's,

I would appreciate if anyone helps me on this,
Thanks,
Ozlem Ipekci

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