I had a data point in a virtual datasource that had been misdefined as binary.
I tried to edit the data point to make it multistate, but ran into a problem.
The edit data point dialog insisted that I define a start value.
While this is desirable and reasonable, when I click in the field for the start value, it appears that an empty dropdown is presented right over the field.
I also tried to do the same thing in the legacy interface. While I was able to enter a start value, there was an error notification when I tried to save it:
No contextual field found for key textRenderer.textRenderer.multistateValues
It seems possible that, for a multistate data point, a set of states need to be defined, but I haven't seen a place to do that.
The behavior appears to be the same whether I try to modify a binary data point to make it multistate, or create a new multistate data point.
The one multistate data point that I have was created a Mango version or two ago. Perhaps this problem recently appeared?
Edit: It seems that this problem also renders already existing multistate data points as uneditable, as in this case, setting a start value is required and the same behavior prevents setting one.