Warning: Output pin "" driven by bidirectional pin "" cannot be tri-stated - Warning: Output pin "" driven by bidirectional pin "" cannot be tri-stated Description You may see this warning in the Quartus® II software version 10.1 SP1 or later during Analysis & Synthesis when you turn on the Rapid recompile option and a previous compilation database exists in the project directory. Resolution You can safely ignore this warning. This warning is scheduled to be suppressed in a future release of the Quartus II software. Related Articles Warning: Always-enabled tri-state buffer(s) removed Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 10.1.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']