Rstudio "Erreur : unexpected symbol in:"

Question

Bonjour, I'm new to Rstudio programming. I used a formula that worked very well but I now maintain an error message which appears while my files are the same as those I used before (with the same symbols: ".", ";" and "NA"). The message is as follows: #heatmap > > #import données fichier csv > library(dendextend) > library(gplots) > library(RColorBrewer) > > setwd("D:\") + + getwd() + + dat<-read.table("test.csv",header=T,dec=",",sep=";",na.strings = "NA") Erreur : unexpected symbol in: " dat<-read.table("test.csv"

Can you tell me why it no longer works? I noticed that there was a new version of "dendextend" that I installed. Thank you in advance for your answers, Julie