[R] error message in "sem"

[John Fox]

Dear Remko,

Can you supply the input that produced this error message?

John

At 04:50 PM 8/11/2003 -0700, Remko Duursma wrote:
>Dear R-helpers,
>
>i get a mysterious error message when using sem,  it reads:
>
>
>"Error in tapply(grad.P[arrows.2.free], ram[ram[, 1] == 2 & ram[, 4] !=  :
>         arguments must have same length"
>
>what does this mean?
>
>remko

-----------------------------------------------------
John Fox
Department of Sociology
McMaster University
Hamilton, Ontario, Canada L8S 4M4
email: jfox at mcmaster.ca
phone: 905-525-9140x23604
web: www.socsci.mcmaster.ca/jfox