R: error message --- package error: "functionName" not resolved from current namespace
r
Solution
This error message can affect functions that call external code using calls to `.C()` or `.Call()`.
The problem is described well in this R-help thread; in particular Martin Morgan's response is useful. He quotes an entry to R's `NEWS` file, when version 3.0.0 was released.
A foreign function call (.C() etc) in a package without a PACKAGE argument will only look in the first DLL specified in the NAMESPACE file of the package rather than searching all loaded DLLs. A few packages needed PACKAGE arguments added.
So the call to `.C()` or `.Call()` needs to be amended in the package's source, to include `PACKAGE = "name_of_dll_without_extension"`.
You can find the DLL names with the following code.
dir(system.file("libs", package = "rpkgname"))
Problem
I am using a package that has worked up until R3.0. the issue is as above .... when we call a function that works in R 2.15.2 from R 3.0 we get an error ``` Error in .C("solarspectrum3", as.double(lon), as.double(lat), as.double(timezone), : "solarspectrum3" not resolved from current namespace (SolarSpectrum) ``` any help would be appreciated Alex The package could be found at https://www.dropbox.com/s/zgspdzd2rq5jmh6/SolarSpectrum_1.0.tar.gz install the package R CMD INSTALL SolarSpectrum_1.0.tar.gz , then run `require(SolarSpectrum)` `longitude=2` `latitude=50` `date=as.POSIXct("2008-06-06")` `PAR <- SolarSpectrum.PAR(longitude, latitude, date)[2]` The error should show up at this time