When calling a .NET object that has a property that sets an enum value, I am getting a runtime error in the .NET code if the enum is defined such that each value is not a sequential number (as in a bit mask). If the values are sequential there is no problem. In both cases, the sequence editor shows a drop down with the names of the enum values but puts the name in quotes.
Does TestStand handle enums with non-sequential values properly?
What version of TestStand are you using? Are you passing the values as a string or as a number? How are you constructing the combined value (i.e. what does your expression for the parameter look like)?