[R] reshape "Error in data[, timevar] : incorrect number of dimensions"

[Keith Schnakenberg]

I have two waves of a survey given to students at various middle  
schools and high schools, with student id numbers for each student. I  
am having difficulty reshaping the file from long to wide.

My code is below:

library(foreign)
svy <- read.spss("studsur4.SAV")

svy.wide <- reshape(svy, timevar="WAVE", idvar="id", direction="wide")

"id" is the student identification number, and "WAVE" takes values 1  
and 2.  I get the following error:

Error in data[, timevar] : incorrect number of dimensions

I would provide reproducible code but I can't reproduce the error  
with any other data. I would appreciate any conjectures as to why  
this is happening.

Thanks,
Keith