An election in GEMS 1.5.5 is defined with State Senate and State Assembly districts, each with 3 child districts. State Assembly is defined as a rotation district. One race is defined - district affiliation set to State Senate child district 10, rotation set to district and rotation district to State Assembly.
Results are saved and the Race Editor re-activated for the race. Clicking on the Options tab results in an Internal Error, as does the selection of any other tab.