Le 22/07/2020 à 14:36, Helmut Schütz a écrit :
Dear all,
I have two variables, foo and bar. The first is TRUE if a png should be
created and the second is TRUE if an already existing one should be
overwritten.
At the end of the plot I had
if (foo | (foo & bar)) dev.off()
This worked as expected in all versions of my package built in R up to
v3.6.3. However, when I CHECK the package in v4.0.2 I get:
> grDevices::dev.off()
Error in grDevices::dev.off() :
cannot shut down device 1 (the null device)
Execution halted
I tried:
if (foo | (foo & bar)) {
dev <- dev.list()
if (!is.null(dev)) {
if (dev == 2) invisible(dev.off())
}
}
without success (same error).
Even the more general
if (foo | (foo & bar)) {
graphics.off()
}
did not work.
The plot is called only in an example of one man-page -- though embedded
in \donttest{}.
Even if I set both foo and bar to FALSE (i.e., the respective part of
the code should not be executed at all), I get the same error.
Hmm... I see 2 possibilities for still getting an error while the
concerned part of code is not supposed to be run:
- either you are running not updated version of your package;
- or the error comes from some other place of the code.
Sorry but without a minimal reproducible example I cannot help more.
Best,
Serguei.
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