Unsupported types for BAnd: 'null' and 'java.lang.Long'

[Brianw_Wolowich]

I did find this in another post. Can I use 'try()' in a binding?
Or is this something I can just ignore as it only shows up in Designer?

@pturmel

The root cause is that tag bindings in a Vision Client don’t have a value when they start–there’s a gateway round-trip that must happen at startup. Expressions must immediately return an answer, so tags are null or sometimes -1 . The try() function is the simplest way to get past the problem.