Why does this produce an error?

BlitzMax Forums/BlitzMax Programming/Why does this produce an error?

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From the BlitzMax docs, with SuperStrict added:

SuperStrict

Local dir:String = ReadDir(CurrentDir())

If Not dir RuntimeError "failed to read current directory"

Repeat
   Local t:String = NextFile( dir )
   If t="" Exit
   If t="." Or t=".." Continue
   Print t	
Forever

CloseDir dir