After 2015.2 has been released, you may find that you are unable to use the & instead of && or the | instead || expressions as operators in your expressions.
In HEAT Release 2015.1 and before, you could use & instead of && and | instead of ||.
Starting in HEAT Release 2015.2, & and | are bitwise operators and cannot be used in that way.
**You must adjust any legacy expressions that use these operators**
This is a breaking change in HEAT Release 2015.2, that all customers should be aware of.