Ultimate test for Lout

[Matěj Cepl]

Hi,

trying to rewrite in Lout "ultimate test" (PDF is shown on page 8 of
http://www.yandy.com/download/pdf_from.pdf , I was told, that it is from
TeXBook) I am not able to persuade lout, that there should be arrow
between the two nodes. When I try the output of following code in
GhostScript, it complains something about bad PostScript. What' wrong
(trying to build the bottom of diagram first)?

                have a nice day
                                        Matthew

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@SysInclude { tbl }
@SysInclude { eq }
@SysInclude { diag }
@SysInclude { doc }
@Doc @Text @Begin

@CenteredDisplay @Diag {
A:: @Eq { R sup 1 f * lpar Omicron sub nu lpar -iM rpar rpar otimes
gamma sup -1 }
@DP
B:: @Square outlinestyle { noline } { 0 }
//
@Link
 path { line }
 arrow { yes }
 from { A }
 to { B }
}

@End @Text