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where clause not in scope error

IK - TECHIK - TECH Member Posts: 14

Good day,
I am new to haskell and I am having difficulty compiling the following function definition

chaseFile :: [FilePath] -- ^ path (directories to search) -> String -- ^ base name -> [String] -- ^ possible extensions -> IO String -- ^ contents of file chaseFile dirs basename exts = do results <- mapM tryReadFile fnames case dropWhile hasFailed results of ((Right (fc,fn)):_) -> errLn ("Read file: "++fn) >> return fc _ -> errLn ("Could not find file: "++basename) >> mzero where fnames = [d++'/':basename++'.':e | d <- dirs, e <- exts] hasFailed (Left _) = True hasFailed _ = False tryReadFile fn = try ( readFile fn >>= \fc -> return (fc,fn) )

The compiler gives the following error
*** Parser:
*** Renamer/typechecker:
..\contrib\StrategyLib-5.0\library\ChaseImports.hs:103:24:
Not in scope: 'try'

Thanks in anticiption

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