[R] incompatibilities between 0.90 and 0.99?

Prof Brian D Ripley ripley at stats.ox.ac.uk
Tue Feb 22 08:22:46 CET 2000

On Mon, 21 Feb 2000, Ramon Diaz-Uriarte wrote:

> Maybe this is dumb, but I seem to be having problems reading a file saved in R
> v. 0.99 into  R 0.90.1 (in a different machine).  
> I did 
> >save(test1, file="test1.RData")
> then I tried to read that data file in R 0.90.1:
> >load("test1.RData")
> Error in load("test1.RData") : restore file corrupted -- no data loaded
> More info:
> - both machines are running Linux; 
> - things work the other way around (i.e., use save in 0.90.1 and load in 0.99); 
> - things do not improve if I save as ascii;
> - I get the problem even with a simple vector;
> - (Things work, though, if I save the data frame with write.table, and then
> use read.table).

Look at the NEWS, which says, right at the top,

    o   The format for save/load has been changed. Workspaces and
        objects saved in earlier versions can be loaded into this
        version, but not conversely. Use save() or save.image() with
        argument oldstyle=TRUE to save in the old format if you need to.

The new format is unknown to the older versions.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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