R help - Jun 2008 - package.skeleton again

Hi the list

I do not manage to build a package using package.skeleton.
My pacakge in called 'partition'
I have no probleme to source the file. Then I run
> package.skeleton("partition")
I get :

Saving function and data...
Error in file(file,ifelse(append,"a","w")):
impossible to open the connexion

In addition, I get more than 50 warnings :

In
dump(internalsObjs,file=file.path(code-dir,sprintf("%s-internal.R",...:
  deparse of an S4 object will not be source()able


Any idee of what is going wrong ?

Thanks

Christophe