readLAS fail (LASlib internal error)

[jfbourdon]

I recently updated lidR and I'm now unable to read LAS/LAZ files that worked perfectly before. I was before on lidR (2.0.0), rlas (1.2.8) and R (3.4.3) and updated to lidR (2.0.2), rlas (1.3.2) and R (3.6.0).

The error that readLAS returns:

Error: LASlib internal error. See message above.
Error in C_reader(ifiles, ofile, select, filter, filter_wkt) :
  LASlib internal error. See message above.

[Jean-Romain]

Please show me which file are failing. In rlas 1.3.2 LASlib has been entirely updated but I did not notice any file I was not able to read.

[jfbourdon]

Here is a small LAZ (link)

[Jean-Romain]

I cannot reproduce. Does the following work for you?

library(rlas)
read.las("~/Téléchargements/clip_LiDAR.laz")
read.lasheader("~/Téléchargements/clip_LiDAR.laz")

[jfbourdon]

Yes, using rlas directly works, but not lidR... I have tried uninstalling/reinstalling lidR without any success.

[Jean-Romain]

No problem with lidR. It is not suprising to me since lidR is not related to this error. This comes from rlas. readLAS basically call rlas::read.las plus some checks on the content. So what you are describing is very weird. Please show me an exact copy of your code and your outputs with reprex

I tried with rlas 1.3.2, lidR 2.0.2, R 3.6.0 on Linux.

library(lidR)
readLAS("~/Téléchargements/clip_LiDAR.laz")
#> class        : LAS (LASF v1.2)
#> point format : 1
#> memory       : 999.3 Kb 
#> extent       :294923, 294943, 5281064, 5281084 (xmin, xmax, ymin, ymax)
#> coord. ref.  : +init=epsg:2949 +proj=tmerc +lat_0=0 +lon_0=-70.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs 
#> area         : 312.1502 m² (convex hull)
#> points       : 12599 points
#> density      : 40.36 points/m²
#> names        : X Y Z gpstime Intensity ReturnNumber NumberOfReturns ScanDirectionFlag EdgeOfFlightline Classification Synthetic_flag Keypoint_flag Withheld_flag ScanAngleRank UserData PointSourceID

^{Created on 2019-05-02 by the reprex package (v0.2.1)}

[jfbourdon]

It now works as it should. The problem was probably caused by a conflict between different versions of R and packages. Also, I was working inside a Rproject created with an other version of R and I was getting other error when trying to install packages. So the problem had probably nothing to do with rlas nor lidR.

[jfbourdon]

I just found the real root cause by accident... the filepath and filename must not contain accent or other similar special caracter. In my case, I had a long path with some à and é. I remove those and the file is correctly read.

[Jean-Romain]

Well, accents should be supported. Look my path in previous post.