Required_fields and pivoting

[mplooker]

has anyone experienced the following error when using required_fields in a measure and then trying to pivot in a visualization?:

Incompatible Data
Unable to chart pivoted data when dimension has repeated values. This commonly happens when you create a query with a second dimension and hide that dimension from the chart.

to me, it seems the the required_fields shouldnt really matter for the pivot because the pivoting/transposing operations take place outside the inner-most explore query and thus if the required_fields fields are not selected as part of the visualization they shouldnt impact the ability to pivot?

I could be crazy but this might be related to the following post from a year or two ago:

Aggregate Awareness using _in_query LookML

Understand the workaround. Problem is that we hide the aggregation from the user like the example at the top so they will not be aware that they would need to employ this workaround.