[R] weird error with a lazyload .RData file in a package

[Michael Friendly]

I added a new data file, NLSY.RData, to a package that uses LazyData: Yes
It passed R CRAN check and R CMD install worked w/o significant complaints.

* installing to library 'C:/R/R-2.15.2/library'
* installing *source* package 'heplots' ...
** R
** data
**  moving datasets to lazyload DB
** demo
** inst
** preparing package for lazy loading
Warning: package 'nnet' was built under R version 2.15.3
** help
  ...

Yet, when I try to use it, I get something incomprehensible:

 > library(heplots)
 > str(NLSY)
Error in str(NLSY) : internal error -3 in R_decompress1
In addition: Warning message:
In str(NLSY) : restarting interrupted promise evaluation
 >

But it works if I load directly from the file I imported into the package:

 > load("NLSY.RData")
 > str(NLSY)
'data.frame':   243 obs. of  6 variables:
  $ math    : num  50 28.6 50 32.1 21.4 ...
  $ read    : num  45.2 28.6 53.6 34.5 22.6 ...
  $ antisoc : int  4 0 2 0 0 1 0 1 1 4 ...
  $ hyperact: int  3 0 2 2 2 0 1 4 3 5 ...
  $ income  : num  52.52 42.6 50 6.08 7.41 ...
  $ educ    : int  14 12 12 12 14 12 12 12 12 9 ...

What could cause this?

-- 
Michael Friendly     Email: friendly AT yorku DOT ca
Professor, Psychology Dept. & Chair, Quantitative Methods
York University      Voice: 416 736-2100 x66249 Fax: 416 736-5814
4700 Keele Street    Web:   http://www.datavis.ca
Toronto, ONT  M3J 1P3 CANADA