APEX

Apex 3.2

On a form, I have two lists :
- Items TYPE contains A B C and D.
- Item MANAGEMENT contains NULL, 1, 2 and 3.

I want to validate that MANAGEMENT is not null only when the value in TYPE are A, B or C.

I am using the condition "Value of Item in Expression 1 Is Contained within Colon Delimited List in Expression 2"

I dont want to hard code these values (A B C) so I put them in an Application Item (I also need them somewhere else).

If I use my application Item in the condition, the validation is not performed (I dont see it listed in debug mode.). If I use the real values (A B C), its working.

Here's what I put in the Exp2 when using the application item :
F126_CONST_BUSINESS_CASE:F126_CONST_PROJ_NON_PLANIFIE:F126_CONST_PROJ_PLANIFIE

I also tried with the form v('F126_CONST_BUSINESS_CASE'): ...

Any Idea ?
Thanks in advance.