ID:11879 Perform Analysis and Elaboration before opening the RTL Viewer.

CAUSE: You attempted to open the RTL Viewer, but the Quartus Prime software cannot open the RTL Viewer until Analysis & Elaboration finishes processing your design. Performing Analysis & Elaboration generates the RTL netlist needed to generate the data in the RTL Viewer.

ACTION: Perform Analysis & Elaboration and then open the RTL Viewer.