opencv installation error using ROpenCVLite

[aharmer]

Hi, I'm keep getting the below error when trying to use ROpenCVLite::installOpenCV(). I managed to install on a different computer but then couldn't install Rvision on that one. Any help wold be greatly appreciated.

• R version: 4.1.3
• ROpenCVLite version: 4.60.2
• Cmake version: 3.23.3
• Rtools version (Windows only): 4.0

OpenCV is not installed on this system. Would you like to install it now? This will take several minutes.

1: yes
2: no

Selection: 1
OpenCV will be installed in C:\Users\HarmerA\OneDrive - MWLR\Documents\R\win-library\4.1\ROpenCV
trying URL 'https://github.com/opencv/opencv/archive/4.6.0.tar.gz'
Content type 'application/x-gzip' length unknown
downloaded 86.0 MB

CMake Warning:
Ignoring extra path from command line:

"C:/Users/HarmerA/OneDrive - MWLR/Documents/MWLR/Documents/R/win-library/4.1/ROpenCV"

CMake Error: Unknown argument -
CMake Error: Run 'cmake --help' for all supported options.
make: Entering directory '/c/Users/HarmerA/AppData/Local/Temp/Rtmp6JN7fd/opencv-4.6.0/build64'
make: *** No targets specified and no makefile found. Stop.
make: Leaving directory '/c/Users/HarmerA/AppData/Local/Temp/Rtmp6JN7fd/opencv-4.6.0/build64'
make: Entering directory '/c/Users/HarmerA/AppData/Local/Temp/Rtmp6JN7fd/opencv-4.6.0/build64'
make: *** No rule to make target 'install'. Stop.
make: Leaving directory '/c/Users/HarmerA/AppData/Local/Temp/Rtmp6JN7fd/opencv-4.6.0/build64'
CMake Warning:
Ignoring extra path from command line:

"C:/Users/HarmerA/OneDrive - MWLR/Documents/MWLR/Documents/R/win-library/4.1/ROpenCV"

CMake Error: Unknown argument -
CMake Error: Run 'cmake --help' for all supported options.
make: Entering directory '/c/Users/HarmerA/AppData/Local/Temp/Rtmp6JN7fd/opencv-4.6.0/build32'
make: *** No targets specified and no makefile found. Stop.
make: Leaving directory '/c/Users/HarmerA/AppData/Local/Temp/Rtmp6JN7fd/opencv-4.6.0/build32'
make: Entering directory '/c/Users/HarmerA/AppData/Local/Temp/Rtmp6JN7fd/opencv-4.6.0/build32'
make: *** No rule to make target 'install'. Stop.
make: Leaving directory '/c/Users/HarmerA/AppData/Local/Temp/Rtmp6JN7fd/opencv-4.6.0/build32'
Warning messages:
1: In if (!grepl("40", pkgbuild::rtools_path())) { :
the condition has length > 1 and only the first element will be used
2: In if (!grepl("40", pkgbuild::rtools_path())) { :
the condition has length > 1 and only the first element will be used

[sjmgarnier]

@aharmer It's a known issue (see https://github.com/swarm-lab/ROpenCVLite/issues/6, https://github.com/swarm-lab/ROpenCVLite/issues/8, https://github.com/swarm-lab/ROpenCVLite/issues/19, https://github.com/swarm-lab/ROpenCVLite/issues/23) for which I'm afraid I don't have a solution but only a clunky workaround. It's caused by the spaces in the installation path (in "OneDrive - MWLR") that throw off the compiler on Windows. The only workaround I know of is to either move the R library location to a folder that has no space in its path or install ROpenCVLite in another R library folder (you can have several if I'm not mistaken) that has no space in its path. See here for some help with that: https://www.accelebrate.com/library/how-to-articles/r-rstudio-library.

[aharmer]

Thanks, that seems to have solved the opencv issue (and sorry didn't realise there were other closed issues).

However, now I am getting a new error when installing Rvision. Any thoughts?

...
** building package indices
** installing vignettes
** testing if installed package can be loaded
*** arch - i386
Error: package or namespace load failed for 'Rvision' in inDL(x, as.logical(local), as.logical(now), ...):
 unable to load shared object 'C:/Users/HarmerA/Rpackages/Rvision/libs/i386/Rvision.dll':
  LoadLibrary failure:  The specified module could not be found.

Error: loading failed
Execution halted
*** arch - x64
Error: package or namespace load failed for 'Rvision' in inDL(x, as.logical(local), as.logical(now), ...):
 unable to load shared object 'C:/Users/HarmerA/Rpackages/Rvision/libs/x64/Rvision.dll':
  LoadLibrary failure:  The specified module could not be found.

Error: loading failed
Execution halted
ERROR: loading failed for 'i386', 'x64'
* removing 'C:/Users/HarmerA/Rpackages/Rvision'
Warning message:
In i.p(...) :
  installation of package ‘C:/Users/HarmerA/AppData/Local/Temp/RtmpMTIxMu/file2afc4fe0535c/Rvision_0.6.2.tar.gz’ had non-zero exit status

[sjmgarnier]

@aharmer I could reproduce the issue here. I will investigate as soon as I can find the time. In the meantime, I will close this issue because it's "solved" (meaning the workaround works for installing OpenCV). Can you open a separate issue on the Rvision Github instead? Thanks.