Unable to load certain packages (image not found error)

[rohanp16]

Hello,

I'm having trouble loading lme4 (as well as some other packages such as glmmTMB, all with the same error messages). The error message is as below,

Loading required package: Matrix
Error: package or namespace load failed for ‘lme4’ in dyn.load(file, DLLpath = DLLpath, ...):
 unable to load shared object '/Library/Frameworks/R.framework/Versions/3.6/Resources/library/statmod/libs/statmod.so':
  dlopen(/Library/Frameworks/R.framework/Versions/3.6/Resources/library/statmod/libs/statmod.so, 6): Library not loaded: /usr/local/gfortran/lib/libgfortran.5.dylib
  Referenced from: /Library/Frameworks/R.framework/Versions/3.6/Resources/library/statmod/libs/statmod.so
  Reason: image not found

My sessionInfo() is as below as well,

R version 3.6.2 (2019-12-12)
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: macOS Catalina 10.15.3

Matrix products: default
BLAS:   /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/3.6/Resources/lib/libRlapack.dylib

locale:
[1] en_AU.UTF-8/en_AU.UTF-8/en_AU.UTF-8/C/en_AU.UTF-8/en_AU.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] Matrix_1.2-18

loaded via a namespace (and not attached):
[1] compiler_3.6.2  tools_3.6.2     splines_3.6.2   grid_3.6.2      packrat_0.5.0   lattice_0.20-40

It was all working fine and then all of sudden this happened, I'm not even sure why or how. Would really appreciate any help!

[andresrcs]

@rohanp16

unable to load shared object '/Library/Frameworks/R.framework/Versions/3.6/Resources/library/statmod/libs/statmod.so':

Your are missing a package dependency, try installing it first

install.packages("statmod")

[rohanp16]

Thank you for the prompt reply @andresrcs. I did that and then got this error.

Error: package or namespace load failed for ‘lme4’ in get(method, envir = envir):
lazy-load database '/Library/Frameworks/R.framework/Versions/3.6/Resources/library/statmod/R/statmod.rdb' is corrupt
In addition: Warning message:
In get(method, envir = envir) : internal error -3 in R_decompress1

However, after restarting R the error disappeared and the packages loaded correctly. While solved, would it be possible to share some insight about how this occurred out of the blue? Thank you

[andresrcs]

Sorry I don't have a sure answer for you, but if I would have to guess, I would say that I it's a side effect of some other update process.