Is there a difference between the X and Y input parameters of a "=" comparison​?

Hello,
In the attached Vi, if I switch the input parameters of the equal comparison, the Vi compiles. Otherwise it shows the class conflict error.
In the real system, I just switched between the parameters and everything worked fine but I'd like to know why this version is wrong so next time I don't waste so much time debugging.
Thanks,
Marce
Attachments:
SDDSSupervisorTest2.vi ‏26 KB

It looks like you dropped a refnum from the front panel palette and then set the type to boolean; this created a weak-typed refnem. To make a strong typed refnum, right click on the control and select create reference; a reference appears on the block diagram. Go to the reference and right click create control. The reference control on the front panel now has the orange star indicating that it is strong typed.
I don't know why equals behaves the way it does with weak-typed references. You might also experiment with the equals operator on the Express palette.
Attachments:
SDDSSupervisorTest2-a.vi ‏34 KB

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