Hi, I am using two packages (quantmod and FRAPO)
Quantmod and FRAPO both have a class names "zoo" R is displaying the following warning when I manipulate an object of class zoo: Found more than one class "zoo" in cache; using the first, from namespace 'quantmod' Also defined by ‘FRAPO’ The warning is displayed every time I manipulate a zoo object and becomes pretty annoying. I searched for a solution but couldn't found. A related but unanswered question is here: http://r.789695.n4.nabble.com/setOldClass-quot-xts-quot-td4714332.html How can I turn off the warning? Reproducible example: library(quantmod) library(FRAPO) z<-zoo(runif(100),1:100) Session Info (I am using Microsoft R): R version 3.4.3 (2017-11-30) Platform: x86_64-w64-mingw32/x64 (64-bit) Running under: Windows >= 8 x64 (build 9200) Matrix products: default locale:  LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252  LC_MONETARY=English_United States.1252 LC_NUMERIC=C  LC_TIME=English_United States.1252 attached base packages:  stats graphics grDevices utils datasets methods base other attached packages:  FRAPO_0.4-1 timeSeries_3022.101.2 timeDate_3012.100 Rglpk_0.6-2  slam_0.1-40 cccp_0.2-4 quantmod_0.4-12 TTR_0.23-2  xts_0.10-1 zoo_1.8-0 RevoUtils_10.0.7 RevoUtilsMath_10.0.1 loaded via a namespace (and not attached):  Rcpp_0.12.10 lattice_0.20-35 codetools_0.2-15 grid_3.4.3 curl_3.1  tools_3.4.3 compiler_3.4.3 [[alternative HTML version deleted]] ______________________________________________ Rfirstname.lastname@example.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.