Use of Feature # in relations
Hello everyone,
I'm working on a project in Creo 12.4.1.0 where I want to use some intelligent relations to fast change some interchange components and their placement into an assembly.
I've the following proof of concept:

Where the different building blocks are placed on some premade coordinate systems. The location of those csys must change with height of the lower level component. The Height will be inserted into a parameter in these components. For this I wrote these relations:
HEIGHT_1:1=HEIGHT:0
HEIGHT2:1=HEIGHT:0
Which works for this combination.
Where the HEIGHT:0 comes from the red blocks. But when changing the second red block to a blue one, is where I run into some problems. As can be seen is the :0 referring to the session ID. (where the blue one is :2)
Is there a possibility of using the feature number instead, because the order of the build is not going to change.
Especially because this example is with two type of blocks but the project has 50 different types of interchange components which will make it much more complex.
Thank you in advance!

