[R] Problem with geterrmessage()

[luke-tierney at uiowa.edu]

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 executes:
> 	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
>
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-- 
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-tierney at uiowa.edu
Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu