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Resolved The "IsNull()" function is not working
  1. How-to
0 Votes
  1. Olan Knight
  2. PowerBuilder
  3. Monday, 14 March 2022 10:26 PM UTC

UPDATE: 

   FYI:  This works:

boolean        lb_valid
string           ls_column

lb_valid = IsNull (adw_object)
IF (NOT (lb_valid)) THEN RETURN                    // <--- the lb_valid value is FALSE at this point, as it should be.

lb_valid = IsValid (adw_object)
IF (NOT (lb_valid)) THEN RETURN


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PowerBuilder 2019R3, b2703
Windows 10, 64 bit platform


This bit of ancient code is failing because the return value of the ISNULL function is TRUE instead of FALSE, as it shoudl be.
Note that PowerBuilder's IDE in debug mode recognizes that the object is NULL. I hovered the mouse over the variable before taking the screen shot.

Is there something I can do to correct this?




Thanks!

 

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