[R-sig-Geo] strange trouble with writeOGR call

[Cynthia Hart]

I am working on an application that uses 'Shiny'; which allows for 
basically running R through a web browser.  My application is tested on 
my Windows laptop then ported to a Linux server.   My application 
analyzes spatial data, and uses the rgdal library.

I am getting s strange error from writeOGR from a recent version of my 
application, and I don't understand why, as the error did not occur 
before on either platform, and the changes should not have effected the 
call to write.

'Error:  Layer Creation failed'

is the error I am getting.  Which seems to imply a permissions problem, 
but I've analyzed that angle to death, and I cannot see a problem (I 
even saved a temporary variable to disk right before the writeOGR call, 
to the same intended directory, and that works fine).   Is there some 
other cause for this error, some other possible problem I should be 
looking for?  Thanks!