Right click on a the Amount pin, and promote to local variable, then do the increment of the local variable, and I have a feeling that will work. I ran into something like this the other day, where I was doing a “inc” of a non-variable (i.e. the value was being generated) and it wasn’t working. Made it a a local var, and it worked.
While what your doing is not a generated value, it is coming from a struc, and well UE4 blueprints, are kind of squirrely with strucs.
If I remember, IncrementInt use var “by ref” so it doesn’t work on funcions in a blueprint, something like that …
That worked. Thank you.