Please read ?try (again) carefully.In paticular note (under Value):
"The value of the expression if expr is evaluated without error, but an
invisible object of class "try-error"containing the error message, and the
error condition as the "condition" attribute, if it fails."
attr(ERRORMESSAGE, "conditon") will give you the error conditon.
"The trouble with having an open mind is that people keep coming along and
sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Thu, Feb 22, 2018 at 1:01 PM, Dennis Fisher <fis...@plessthan.com> wrote:
> Thanks — I revised the code to:
> ERRORMESSAGE <- try(source(USERSCRIPTFILE, local=T), silent=T)
> print(ERRORMESSAGE) now returns:
>  0
>  FALSE
> Not clear what to make of that.
> Dennis Fisher MD
> P < (The "P Less Than" Company)
> Phone / Fax: 1-866-PLessThan (1-866-753-7784)
> > On Feb 22, 2018, at 12:45 PM, luke-tier...@uiowa.edu wrote:
> > Only the default error handler puts the error message in a buffer
> > where it can be retrieved with geterrmessage. try() replaces the
> > default error handler. Either look at the value returned by try() or
> > use tryCatch with conditionMessage.
> > Best,
> > luke
> > On Thu, 22 Feb 2018, Dennis Fisher wrote:
> >> R 3.4.3
> >> OS X
> >> Colleagues
> >> I have a 20K line script in which I encounter an unexpected problem.
> >> If the script detects presence of a particular file USERCODE.txt, it
> >> source(“USERCODE.txt”)
> >> If that file is not present, the script executes without a problem.
> >> There might be syntax errors in USERCODE.txt; therefore, the code above
> is embedded in a try command:
> >> try(source(“USERCODE.txt", local=T), silent=T)
> >> followed by:
> >> ERRORMESSAGE <- geterrmessage()
> >> For unclear reasons, an earlier command is yielding an error message:
> >> unused argument (\"\\n\")
> >> Despite identifying the exact source of that error, I can’t fix it (and
> it is of no consequence).
> >> Ideally, I would like to clear out the pre-existing error message
> immediately before the “try” command (or perhaps at that particular
> location where it is being created) — but I can’t figure out how to do so.
> >> Any suggestions would be welcome.
> >> Dennis
> >> Dennis Fisher MD
> >> P < (The "P Less Than" Company)
> >> Phone / Fax: 1-866-PLessThan (1-866-753-7784)
> >> www.PLessThan.com
> >> ______________________________________________
> >> Rfirstname.lastname@example.org mailing list -- To UNSUBSCRIBE and more, see
> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> PLEASE do read the posting guide http://www.R-project.org/
> >> and provide commented, minimal, self-contained, reproducible code.
> > --
> > Luke Tierney
> > Ralph E. Wareham Professor of Mathematical Sciences
> > University of Iowa Phone: 319-335-3386
> > Department of Statistics and Fax: 319-335-3017
> > Actuarial Science
> > 241 Schaeffer Hall email: luke-tier...@uiowa.edu
> > Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu
> Remail@example.com mailing list -- To UNSUBSCRIBE and more, see
> PLEASE do read the posting guide http://www.R-project.org/
> and provide commented, minimal, self-contained, reproducible code.
[[alternative HTML version deleted]]
Rfirstname.lastname@example.org mailing list -- To UNSUBSCRIBE and more, see
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.