R: unused argument (header = TRUE)

Problem: read operation in R language returns next message or any other similar:

unused argument (header = TRUE)

Solution: it could be for at least two reasons:

1. header = TRUE is not correctly written, TRUE must be in uppercase or you can use just a ‘T’.
   Example: read.csv(filename, header = TRUE) or read.csv(filename, header = T) are correct.
2. You are using something like readr::read_csv(filename, header = TRUE), just change readr::read_csv to read.csv.

Source: R documentation

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