package - Unable to load shared object -


i'm trying load jsonlite package, , : 

> library(jsonlite)   error in indl(x, as.logical(local), as.logical(now), ...) : unable load shared object 'c:/users/xxxx/documents/r/win-library/3.1/jsonlite/libs/x64/jsonlite.dll':    loadlibrary failure:  specified procedure not found.

i don't have problems other packages. ideas?


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