Jun Yan wrote:>
> I have a tiny R script performing two tasks, the first one of which may
> contain error.
>
> mammon(12)% cat z.R
> version
> options(show.error.messages = FALSE)
> try(b <- log("foo")) ## task 1
> 1 + 2 ## task 2
>
> Running in batch mode from a solaries machine, the second task never got
> started; see below:
>
> mammon(13)% R BATCH --vanilla -q z.R
> mammon(14)% cat z.Rout
> > invisible(options(echo = TRUE))
> > version
> _
> platform sparc-sun-solaris2.8
> arch sparc
> os solaris2.8
> system sparc, solaris2.8
> status
> major 1
> minor 5.1
> year 2002
> month 06
> day 17
> language R
> > options(show.error.messages = FALSE)
> > try(b <- log("foo"))
> >
>
> The second task does start if run on a linux machine.
>
> ludwig(22)% cat z.Rout
> > invisible(options(echo = TRUE))
> > version
> _
> platform i686-pc-linux-gnu
> arch i686
> os linux-gnu
> system i686, linux-gnu
> status
> major 1
> minor 5.1
> year 2002
> month 06
> day 17
> language R
> > options(show.error.messages = FALSE)
> > try(b <- log("foo"))
> > 1 + 2
> [1] 3
> > proc.time()
> [1] 0.87 0.07 0.90 0.00 0.00
> >
>
> The same code works well if pasted into an interactive R window.
It's not easy to test that, is it?
The next expressions will be evaluated anyway -- with or without a
working try() around it.
> I wonder what is causing the problem on solaries. I need to run a program
> on solaries because the program calls an executable only available for
> solaries.
For me it looks like a bug.
I am not very sure, particularly since it is there since at least
R-1.1.1, which is the oldest running R version I have got on our Solaris
system, and nobody reported anything like this (nothing similar in the
database).
Regularly you would write a function such as
testit <- function(){
version
options(show.error.messages = FALSE)
try(b <- log("foo")) ## task 1
1 + 2 ## task 2
}
testit()
which works in a batch file and is at least a workaround.
Uwe Ligges
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