Expression binding in template

Hello,

I am creating a template and trying to bind a template parameter and keep getting this error. I am new to scripting and would appreciate assistance.

You can not nest a tag path into another tag path. Which is exactly what the error message is telling you.

This syntax:

{[WinProcessing]ALSAFE_{Alsafe.TANK_NUM}/valve/V107B.value}

Is illegal in the expression language.

What you should do insead is create a custom property which you bind with an IndirectTag Binding for each of the paths. Then this epression would look something like:

{Alsafe.V107B} || {Alsafe.V107A}