[Haskell-beginners] help me with eroor

[kolli kolli]

import Text.ParserCombinators.Parsec

csvFile = endBy line eol
line = sepBy cell (char ',')
cell = many (noneOf ",\n")
eol = char '\n'

parseCSV :: String -> Either ParseError [[String]]
parseCSV input = parse csvFile "(unknown)" input

*showing error:
<interactive>:1:32: Not in scope: `main'
*
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