I use to work whit stata dataframe, so, when I use R I type read.dta
Until today I do that without any problem, after type:

mydata<-read.dta("C:/dropbox/dataframe.dta")
attach(mydata)

Everything works great... but today, when I typed:

mydata<-read.dta("C:/dropbox/dataframe.dta")
attach(mydata)

Appeared:

Error in substr(these, 1L, 6L) : invalid multibyte string at '<f1>'

I searched in google and nothing. Can anyone help me?

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