.Fortran question

[Chris Moyer <cmoyer@fs.fed.us>]

Fellow subscribers:

I am using the following call to varcomp() to decompose the variance of my
   dataset:

do <- varcomp(DO ~ YEAR + CREEK.CODE + INITIAL.SITE %in% CREEK.CODE +
   CREEK.CODE:YEAR + INITIAL.SITE %in% CREEK.CODE:YEAR + VISIT, qaqc.03[
   qaqc.03$YEAR == "2001",  ], method = "reml", na.action =
   na.omit)$variances

and am getting the following error:

Problem in .Fortran("zonly",: subroutine zonly: Missing values in argument
   10
Use traceback() to see the call stack

Can anybody tell what this means or how to fix it? This is way beyond my S
skills.

SPlus 6.1 on Win 2000.

Thanks.

Chris Moyer
AREMP Field Operations Supervisor
Aquatic and Riparian Effectiveness Monitoring Program
Phone: 541.750.7017
Cell: 541.231.8934 (NEW)
Fax: 541.750.7234