[R] X11 PNG Error

[Harsh]

Hi All,
I am running R 2.6.0 on an Ubuntu 8.04 with Rserve on a machine.
I send R commands from a Windows computer to the R machine  and a few
commands require the creation of plots on png devices.

I often get the following error:
Error in X11(paste("png::", filename, sep = ""), width, height, pointsize,  :
  unable to start device PNG

I've solved this error at times by restarting Rserve. But it seems to
crop up frequently. I've installed the libpng libraries on Ubuntu but
to no avail.

Any help in this regard will be highly appreciated.

Regards
Harsh Singhal
Mu Sigma Decision Systems Inc.