Hi @David.Irwin 

Thanks for bringing this up! Looking into this, I don’t think it’s a bug. Rather, this is expected behavior for the MCE. 

Whenever we define an operand within the Multi-Configuration Editor, its initial value for all configurations will default to the current state as defined by the current configuration. I believe that may be what you’re seeing. 

For example, take the following system:

Here we have two sets of surfaces ignored. The current configuration is 2, so we see that in this case, surfaces 2, 3, 4, and 5 are ignored. Now, let’s say I change the First Surface to 3. What will happen is all configurations will be updated to match the state of this input. In other words, if surface 3 is ignored in the current configuration, then IGNM will be set to 1 for all configurations, as shown below:

If the active configuration had been configuration 3 before I made the update, then surface 3 would have been active. In that case, the first IGNM operand would have been set to 0 for all configurations. This type of update is based on the value of First Surface for the IGNM operand. 

This is the behavior we see for all operands. For example, if you add the operand THIC to the MCE, the initial value for all configurations will be the thickness for the surface in question within the current configuration.

I hope that helps clarify the behavior. Let me know if you have any other questions about this!