missing R.dll file

Dear R People:

I was using R with no problems last night.

Now tonight, when I type in "Rgui", I get an error message that R.dll
is not found and try to re-install.

Have any of you run into this, please?

Thanks,
Erin

Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: erinm.hodgess at gmail.com