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Validating user-specified date? (DCL)

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The Question is:

 
How do I check a date to see if it is valid inside a DCL script?  I am trying
 to take in the date as a paramater and am then searching files for records of
 that date, but I want to ensure a valid date.

The Answer is :

 
  Parse the user-specified date via one of the available DCL lexical
  functions.  eg: f$cvtime.  If the parse fails, then the user-specified
  date is not valid.
 

  
     
     answer written or last revised on ( 15-MAY-2000 )
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