iup.getFile fails

[juanv]

    import iup
    discard iup.open(nil,nil)
    var cs : cstring = "*.txt"
    echo iup.getFile(cs)
    iup.close()
    
    
    Run

Program crashes before show the getFile result: SIGSEGV: Illegal storage 
access. (Attempt to read from nil?)

Success if press the cancel button in file dialog.

(Windows 7, iup30.dll)