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Using the Mavericks/Yosemite version of R 3.2.0, I see this: > utils::help.search("linear models") Error in help(db[i, "topic"], package = db[i, "Package"], lib.loc = lib, : 'topic' should be a name, length-one character vector or reserved word Using R 3.1.2 on a SnowLeapard branch does not produce the same result. I do get the expected large number of

...s the same in both versions. I do not see where `help.search` calls `help`. > > Tracing help is unrevealing. The first call to `help` throws the error and the call looks exactly like the calls in R 3.1.2 > See this thread on R-SIG-Mac https://stat.ethz.ch/pipermail/r-sig-mac/2015-April/011420.html This may help. Get R 3.2.0-patched or even the release candidate for R 3.2.1 Berend > -- > David Winsemius > Alameda, CA, USA > > ______________________________________________ > R-devel at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel