A clue for using Valentina by XCMD

[Ben Rubinstein]

Thanks Andre, Klaus, and Robert (offlist) for your swift replies.

For the benefit of anyone else tracking this in the list archives; Rev does
ship with the VXCMD (although not necessarily the latest version); but in
order to make use of it in your own stacks, you need to set the "externals"
property of the stack and then re-open it.

So to get started, set the "externals" property of a stack to a path to the
VXCMD, ie to start with to something along the lines of
    /Applications/Revolution 2.1/components/global
environment/database_drivers/MacOSX/VXCMD_macho

Save this stack, close+remove from memory, open it, and either with it as
the top stack, or after 'start using' it, one can then at last call the
function "Valentina", eg

   put Valentina("version")

which on Rev 2.2 returned "1.9.8b2".  Hurrah!


Secondly, one needs to know that Valentina doesn't seem to do much in the
way of error checking; if you make mistakes, you are liable to be punished
by Rev immediately crashing.  So save early and often.  For example,
although you can get the version without initialising Valentina, attempting
to create a database before initialising will result in immediate crash.

Thirdly - the VXCMD_Reference.pdf does not contain a reference to the error
codes.  These can be found in "ValentinaKernel.pdf".

Well, that's got me started.  Thanks very much.  Here we go...

  Ben Rubinstein               |  Email: benr_mc at cogapp.com
  Cognitive Applications Ltd   |  Phone: +44 (0)1273-821600
  http://www.cogapp.com        |  Fax  : +44 (0)1273-728866