[R-sig-Geo] connection error when calling maxent()

[Rafael Wüest]

> It appears that the MaxEnt output file gets overwritten by another process.

Yes, I also have this impression after some testing (e.g. the temporary raster directories got emptied every time I started a new R raster session in parallel).

The problem disappeared when I updated to R 2.13.2, so no more worries from my side!

Many thanks for the help and the development of raster and associates - it's just great!

Rafael

On 12.01.2012, at 01:33, Robert J. Hijmans wrote:

> Rafael,
> 
> Please send more info about what you are doing. It appears that the MaxEnt output file gets overwritten by another process. Can you also send your sessionInfo() (after first updating R to a more recent version)?
> 
> Robert
> 
> 
> On Wed, Jan 4, 2012 at 8:52 AM, rafael.wueest <rafael.wueest at wsl.ch> wrote:
> Hi Folks
> 
> when I am trying to call the maxent() function within a function I created,
> I am getting the following error:
> 
> Error in file(con, "r") : cannot open the connection
> In addition: Warning message:
> In file(con, "r") :
>  cannot open file
> '/var/folders/ft/fthJYD+6GkCvmcCArZBaQU++waU/-Tmp-/R_raster_tmp/maxent/10943312360/species.lambdas':
> No such file or directory
> 
> I am here also pasting some output of
> >traceback()
> 7: file(con, "r")
> 6: readLines(paste(dirout, "/species.lambdas", sep = ""))
> 5: unlist(readLines(paste(dirout, "/species.lambdas", sep = "")))
> 4: .local(x, p, ...)
> 3: maxent(background, occ, args = me.args) at run4models_restios.r#558
> ...
> 
> I am using JGR on a Mac and downloaded the newest dismo (CRAN sources) and
> maxent version (see below).
> 
> Can anyone help me? I am happy to provide more detailed information...
> 
> Rafa
> 
> >maxent()
> This is MaxEnt version 3.3.3k
> 
> >sessionInfo()
> R version 2.12.2 (2011-02-25)
> Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
> 
> locale:
> [1] C
> 
> attached base packages:
> [1] splines   stats     graphics  grDevices utils     datasets  methods
> [8] base
> 
> other attached packages:
>  [1] gbm_1.6-3.1           survival_2.36-5       gam_1.04.1
>  [4] PresenceAbsence_1.1.5 maptools_0.8-10       lattice_0.19-33
>  [7] foreign_0.8-42        rgdal_0.6-33          dismo_0.7-14
> [10] raster_1.9-13         sp_0.9-84             JGR_1.7-7
> [13] iplots_1.1-4          JavaGD_0.5-4          rJava_0.9-1
> 
> loaded via a namespace (and not attached):
> [1] grid_2.12.2  tools_2.12.2
> Warning message:
> 'DESCRIPTION' file has 'Encoding' field and re-encoding is not possible
> 
> 
> --
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> 
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--
Rafael Wüest
Swiss Federal Research Institute WSL
Zürcherstrasse 111
8903 Birmensdorf
Switzerland

+41 44 7392126
rafael.wueest at wsl.ch
http://www.wsl.ch/info/mitarbeitende/wueest