So can we interpret this to mean that update.packages() will fix (replace) old 
packages that were copied into the new library? What if one or more packages 
were dropped/archived or pulled from non-standard package sources?

On May 27, 2026 2:06:12 PM PDT, Uwe Ligges <[email protected]> 
wrote:
>
>
>On 27.05.2026 18:01, Karl Schilling wrote:
>> I am running R under Windows 11. recently updated R to the 4.6patchhed 
>> version. I then copied my packages from my previous version (4.5) to the 
>> library of 4.6. Then I updated all packages.
>> 
>> Since then, I see the following behavior:
>> 
>> Each time I run "update.packages(ask='graphics',checkBuilt=TRUE)" I am asked 
>> TWICE
>> 
>> "--- Please select a CRAN mirror for use in this session ---".
>> 
>> And, more embarrassingly, all my Cran and Bioconductor are said to require 
>> an update. That also happens when I run "update.packages", say, one hour 
>> after my last update.
>> 
>> And when I run "old.packages()", it seems that all my packages are 
>> identified as being old.
>> 
>> Any suggestions what might be going on?
>
>For a major version change (as from 4.5.x to 4.6.y) we do not guarantee API 
>compatibility, hence we cannot guarantee that a package built for 4.5.x will 
>work under 4.6.y. As a consequence, update.packages() knows that everything 
>has to be reinstalled.
>
>Best,
>Uwe Ligges
>
>
>
>
>
>
>> Thank you so much in advance,
>> 
>> Karl Schilling
>> 
>> ______________________________________________
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>> PLEASE do read the posting guide https://www.R-project.org/posting- 
>> guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>

--
Sent from my phone. Please excuse my brevity.
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