Coding char dependencies with empty values

Hello,

http://scn.sap.com/docs/DOC-40272

I am trying to apply what is explained in this document regarding the use of variant tables in dependencies.

I could not apply it to my case because I have sometimes empty values.

Example:

CH_KEY / CH_1 / CH_2

1 / A / A

2 / A / B

3 / *empty* / A

The error I get from SAP is "No value could be inferred from table xxx: dependency yyyy"

Somebody would have an idea how to adapt the code for this kind of configuration ?

The code called in the dependency is the following:

table V_XXX (

CH_KEY = $self.CH_KEY,

CH_1 = $self.CH_1,

CH_2 = $self.CH_2 )

Thanks a lot

Benjamin