Raster::exctract in Rstudio no longer works

HPC Support HPC issues
1

Hello,
last week I ran this command:

raster_altitude_agreg ← aggregate(edm, fact=res(tasr1)/res(edm), fun=mean, na.rm=TRUE)
altitudeMoyenne ← raster::extract(raster_altitude_agreg , v_elev)

And it worked perfectly.

But now, it doesn t work anymore. I still get an error message:

AltitudeMoyenne ← raster::extract(raster_altitude_agreg,coord_lonlatC)

Error in file(fn, “rb”) : cannot open the connection
In addition: Warning message:
In file(fn, “rb”) :
cannot open file ‘/tmp/RtmpiwjSJ7/raster/r_tmp_2024-04-29_084403.028646_2725427_25595.gri’: No such file or directory

altitudeMoyenne ← raster::extract(raster_altitude_agreg , v_elev)
Error in file(fn, “rb”) : cannot open the connection
In addition: Warning message:
In file(fn, “rb”) :
cannot open file ‘/tmp/RtmpiwjSJ7/raster/r_tmp_2024-04-29_084403.028646_2725427_25595.gri’: No such file or directory

I am not sure to understand what is happening ?
My working directory is normally the same.

This is the same for writeRaster() function.

Thank you in advance.

Mariana

2

Dear @Mariana.Bouvier-Rabe the error message seems related with your code, not Rstudio. Try to share your code with us, maybe someone with R knowledge will be able to help you.

Best

3

Hello,
Thank you for your answer. Finally, the problem no longer occurred. I did’nt understand what happened.

Have a nice day,

Mariana

4

In case this happens again: this could be due to the fact that raster is using temporary files when the raster doesn’t fit in memory. So you would need to look at functions like showTmpFiles(), eventually setting your own rasterOptions(tmpdir = "D:/rtmp/"), to try to understand where the problem is.

Note also that raster has now been superseded by terra, so ideally use terra::extract() instead?

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