Hello,
It's several days I try to track this bug, and even cannot cook a
reproducible example. Yet, it occurs consistently in a long-running task
after a variable period of time. Here is an example:
... my long-running code [as I said, cannot give something simple
that produces this bug in a reproducible manner]
Error in match(x, table, nomatch = 0L) :
formal argument "nomatch" matched by multiple actual arguments
> traceback()
6: match(x, table, nomatch = 0L)
5: "factor" %in% attrib[["class", exact = TRUE]]
4: structure(.Internal(Sys.time()), class = c("POSIXt", "POSIXct"))
3: Sys.time()
2: chemTrigger() at chemostat_1.0-1.R#1132
1: chemRun()
So, the culprid is a call inside `%in%` (from within structure() in
Sys.time()). But I can run millions times `%in%`, or structure(), or
Sys.time() on my machine without producing this bug. Arguments at 5: are
simple character strings. They don't hurt!
Also, I am lost because the message is totally illogical in the context
where it appears: I can understand this message here:
> match(1, 2, nomatch = 0L, nomatch = NA)
Error in match(1, 2, nomatch = 0L, nomatch = NA) :
formal argument "nomatch" matched by multiple actual arguments
or here:
> test <- function (...) match(1, ..., nomatch = 0L)
> test(2, nomatch = NA)
Error in match(1, ..., nomatch = 0L) :
formal argument "nomatch" matched by multiple actual arguments
but in the call "match(x, table, nomatch = 0L)" where x is the character
string "factor" and table is another character string ("numeric")
extracted from a list, I don't understand why it produces this error
message. '.Internal(Sys.time())' uses do_systime c code that returns a
one-element double... not something that can hurt here?!
Can someone explain me, or give me an example where an argument is NOT
duplicated in the call (well, as I understand it here) and where one
gets such an error message? And why?
Many thanks, I am desperate :-(
I got this error on R 2.11.1 on Mac OS X 10.6.4, and on R 2.10.1 on
Windows XP SP3 (but it does not matter, since I cannot cook a
reproducible example).
Philippe
P.S.: seems related to this:
http://finzi.psych.upenn.edu/Rhelp10/2008-June/165101.html
--
..............................................<°}))><........
) ) ) ) )
( ( ( ( ( Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( ( Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons University, Belgium
( ( ( ( (
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