VUTRAX SOFTWARE ADVICE NOTICE 145 - 3 Mar 1996

    VUTRAX for Windows - PLOT Postscript Output Compatibility

Symptom:

    Round Nodes and Holes in PLOT Postscript format are invisible
    in output from the Acrobat reader.

Cause:

    Some  sequences  in  the  Postscript   language   have   been
    interpreted   differently   by   different   programmers.  In
    particular we interpret a round ended line of zero length  as
    generating  a  filled  circle,  as  do  most  of  Adobe's own
    interpreters.

    Some third party software suppresses such  output  completely
    leaving  out  important  parts  of the output. One example we
    know of is the Acrobat reader.

    We understand that in due course the behaviour of the Acrobat
    reader may be changed.

Workaround:

    Create an alternate control file from PSCRIPTP.PXY  with  the
    following  modification.  The  effect  is that round pads are
    elongated by 0.001" (often  invisible  at  normal  screen  or
    printer resolutions), but they will now at least appear:-

        SEE \VUTRAX\MAIN\PSCRIPTP.PXY \VUTRAX\MAIN\ACROPOST.PXY

        Edit line 33 from

            $T1=$V251,^G; $V1,u/16&1; $V1,V; $V1,W; ...
                              ... $V1,X; $V1,Y; vl$K13;$K10;$R$U$

        to 3 new lines (mostly derived from the above):-

            $T1=$IV=X;$IW=Y;$

            $V251,^G; $V1,u/16&1; $V1,V; $V1,W; ...
                            ... $V1,X; $V1,Y+1; vl$K13;$K10;$R$J$

            $V251,^G; $V1,u/16&1; $V1,V; $V1,W; ...
                              ... $V1,X; $V1,Y; vl$K13;$K10;$R$U$

    (The office can supply a ready edited file if you prefer.)

    Select this new file to produce your  Postscript  output.  If
    you also have a Postscript printer you should continue to use
    the original PSCRIPT?.PXY file when you output to it.


Circulation:
    With next bulletin.
    Thereafter include with deliveries  to  new  customers  until
    READ*.ME and SYSVER both reference this SAN.