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DCL Commands and Logical Names?

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The Question is:

How do you undefine something?
I used the wrong command and put ora_root in the sytem table:
define/system ora_root $disk0:[oracle8.]
it should have been
define/process ora_root $disk0:[oracle8.]
The redefinition did not remove the first one
from system.  How do you take the first definition out?  It causes a logical of
ORA_SYSTEM to be used.
P.S. The documentation and help functions did not appear to have a cure for
 this problem.

The Answer is :

  The chapter on logical names that is included in the OpenVMS User's
  Guide has a section entitled "Deleting Logical Names", which points
  directly to the DCL command DEASSIGN.
  The OpenVMS DCL dictionary includes the following statement, as well:
  "You can also use the ASSIGN command to create logical names. To delete
  a logical name from a table, use the DEASSIGN command."
  The OpenVMS Wizard encourages skimming both the OpenVMS User's Guide
  and the DCL Dictionary.  Additionally, books on DCL programming are
  The on-line OpenVMS documentation set and bibliographic information
  are both referenced in the OpenVMS FAQ.

answer written or last revised on ( 29-JUN-2001 )

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