PRODUCT  :  Paradox Engine                        NUMBER  :  1000
  VERSION  :  All
       OS  :  All
     DATE  :  October 19, 1993                         PAGE  :  1/1

    TITLE  :  Understanding the PARADOX.NET File




  The Paradox Engine uses the Paradox net file in the same way that
  Paradox does--to keep track of the number of users.  Each Paradox
  user is given one count, while the Engine is assigned one count
  for all users.  So, for example, if three Paradox and three
  Engine users use the same Paradox net file, the user count would
  be four (one for each Paradox user, and one of the three Engine
  users).

  The net file also regulates access to tables.  Table access is
  enforced through the use of lock files, which are written out to
  the directories containing Paradox tables.  A lock file points to
  a particular net file, which has exclusive control over the
  table.  This means that any user wanting access to the table must
  use the net file that controls the table.  In practice, this
  means that when your Engine program shares tables with Paradox
  users, you must initialize using PXNetInit, with netpath set to
  the Paradox net path.  In the case of two Engine programs sharing
  tables, the net paths must be identical.

  The message "Multiple Paradox net file found" (Error
  PXERR_NETMULTIPLE) indicates that these rules have not been
  followed.  If you are certain that all current users have the
  same net path, this message usually indicates that an old lock
  file exists that points to a different net file.  Old lock files
  can be deleted if care is taken to ensure that no one is
  currently using them.  Deleting active lock files can produce
  unpredictable results and could cause loss of data.


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  subject to the terms of the No-Nonsense License Statement that
  you received with the Borland product to which this information
  pertains.