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March 2007, Week 1

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Subject:
MPEX prompt question
From:
Larry Barnes <[log in to unmask]>
Reply To:
Larry Barnes <[log in to unmask]>
Date:
Thu, 1 Mar 2007 10:38:41 -0800
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text/plain (21 lines) 
Below is a standard prompt which also does some checking on the value
input.  I'm trying to figure out a way to use this command and also have
it check if the user just presses the enter-key (which is a valid
option).  I can't figure out how to do this.  Anyone out there have a
suggestion?  It works for any of the 4 values in the POS statement with
the exception of a blank (pressing the enter-key) with nothing else
entered.

I would greatly appreciate any help; and thanks in advance.

Larry B.


 %prompt string _tapec = "Enter Cycle type: (PART, FULL, MEND, or AVAL):
" ;&
   check = pos(ups(_tapec),'PART FULL MEND AVAL ') > 0 ;&
   checkerror = Invalid tape cycle name; try again or <ctrl-y> to exit "

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