[R-pkg-devel] Errors in r-devel (Linux) and r-patched (Solaris)

Helmut Schütz he|mut@@chuetz @end|ng |rom beb@c@@t
Wed Apr 8 14:53:29 CEST 2020

Dear Sebastian,

Sebastian Meyer wrote on 2020-04-08 14:15:
> Do both of your R installations use the same version of lme4 ?

THX, good point! On R3.6.2 I have lme4 1.1-21 (2019-03-05) and on R3.6.3 
indeed yesterday's lme4 1.1-23.

> A new lme4 version has been published on CRAN yesterday and some changes
> regarding default numerical tolerances in optimizations could explain
> the difference in your results. See the NEWS here:
> https://cran.r-project.org/web/packages/lme4/news.html

I see. Since the other 93 (!) tests passed, I will submit a fix only for 
_this_ data set. A little bit nasty since we recently published a paper 
about software validation: https://dx.doi.org/10.1208/s12248-020-0427-6
The supplementary material contains code for IQ (installation 
qualification). If a user on r-devel (Linux) or r-patched (Solaris) runs 
it – with the current lme4 - he/she will be slapped in the face and the 
suppl. material will tell him/her:
"If a test fails […] the package did not pass IQ in the user’s 
computational environment (hardware, operating system, R-release) and 
_must not_ be used."


Ing. Helmut Schütz
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