[R] error: too many open devices

[Guillermo Acosta]

Hello all--

I've been using 1.13 (v1915) on my Mac pretty intensly for about a
month, but today when I tried to generate a plot I recieved this
message:

Error in quartz(width=9)   :  too many open devices

I was caught by surprise, because I only had the R console open at the
time. I checked to be sure, by clicking "Window" at the top bar, and R
console was the only window open. I thought I had a problem in the
workspace, so I switched to a different one that worked earlier today,
but the error was there too. I tried clearing the workspace entirely,
and creating a single vector and plotting that, but again I got this
error about "too many open devices". I even quit R, closed everything
I had, and restarted... but this error is still there.

Has anybody seen this before? I'm sure it's a pretty simple fix,
except I've run out of the places that I can think to look.

Many thanks in advance,
Sincerely,
Guillermo Acosta
Graduate Student
Department of Physics and Astronomy
Brigham Young University