Error in `colnames<-`(`*tmp*`, value = names(getMu(Data))) : attempt to set 'colnames' on an object with less than two dimensions

General
1

Boa tarde,
estou tentando reproduzir o seguinte código:

portfolioFrontier(ret[,1:81])
e me aparece o erro destacado acima

Error in colnames<-(*tmp*, value = names(getMu(Data))) : attempt to set 'colnames' on an object with less than two dimensions

2

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