Forum Discussion

coharness's avatar
coharness
Occasional Contributor
6 years ago

Object sometimes doesn't support Exists

I have been having an issue throughout some of my scripts where an object suddenly doesn't support the Exists property. When running through the below code, sometimes the script will crash on the if ...
LinoTadros's avatar
LinoTadros
Community Hero

Thank you coharness for your question,

 

It is a chicken and egg kind of situation.

Your code will always work correctly as long as "key" is not NULL.  That means the Object associated with it was found and then the value of True or False is validated.

Unfortunately, if the object is underfined or Null, saying if (key.Exists) is causing a crash as you are accessing a property of a NULL object.

So the correct way to do this is ALWAYS:

if (key != Null)

{

 if (key.Exists) 

...

}

That is always the safe way of checking before causing a Null pointer exception in the code.

Thanks

-Lino

coharness's avatar
coharness
Occasional Contributor
6 years ago

Thanks for the suggestion. Unfortunately, even when wrapped in that null check it still fails the key.Exists line.