Error: package or namespace load failed for ‘nlmix

[dervieux1]

Getting this error after installation.

library(nlmixr)
Error: package or namespace load failed for ‘nlmixr’:
.onLoad failed in loadNamespace() for 'vctrs', details:
call: NULL
error: The vctrs package is not properly installed.
x The DLL version (0.3.2) does not correspond to the package version (0.3.1).
i Please update vctrs to the latest version.
i Updating packages on Windows requires precautions:
rstats-wtf/what-they-forgot#62
In addition: Warning message:
package ‘nlmixr’ was built under R version 4.0.2

[diabloyg]

I didn't see this during my installation so just a guess. When I do installation several months before similar issues happened to my "lotri" packages, though I forgot the details. My recommendation is that uninstall the package "vctrs" and reinstall it again manually. If it didn't work, then back to R 3.6.3 might help. I am not sure whether R version above 4.0 would lead to compatibility issues. @mattfidler

[mattfidler]

Typically you should restart R and even run R in console mode to make sure that no packages are installed. You should then uninstall vctrs and then reinsall it.

It seems you are keeping your old R libraries and upgrading R. This is a bad pratctice. Sometimes packages don't work if you install in this manner, though it is less likely in minor upgrades like R 4.0.2 to R 4.0.3

[dervieux1]

Still having error message after reinstalling "vctrs"

devtools::install_github("nlmixrdevelopment/nlmixr")
...
package ‘digest’ successfully unpacked and MD5 sums checked
Error: Failed to install 'nlmixr' from GitHub:
(converted from warning) cannot remove prior installation of package ‘digest’

[mattfidler]

You have to reinstall digest now;

Since digest is used in many packages, you will need to restart R/windows for this as well.

[dervieux1]

thank you