I have the following error:

"error: JAVA_HOME cannot be determined from the Registry"

for this package:

https://bioconductor.org/checkResults/devel/bioc-LATEST/paxtoolsr/riesling1-install.html

I have been given assurances that Java is present but given this error, I am not so sure and I am unsure how to debug or fix it.

Can anyone suggest how to proceed?

This is the wrong place to ask questions about package development or our daily builds. Please ask on the bioc-devel mailing for that. Thanks