Error: Can’t route signal to atom - Error: Can’t route signal to atom Description If you apply both a FAST_INPUT_REGISTER assignment to an I/O and a D3_DELAY assignment to the associated delay chain, compilation might fail with an error similar to the following: Error: Can’t route signal "in~input" to atom "io_ff" Error: Can’t fit design in device Resolution Do not apply both a D3_DELAY assignment and a FAST_INPUT_REGISTER assignment. You may safely apply either assignment, but not both. Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 11.0 ['Stratix® V FPGAs'] ['novalue'] ['novalue'] ['novalue'] - 2021-08-25