Critical Warning (15714): Some pins have incomplete I/O assignments. Refer to the I/O Assignment Warnings report for details
Info (11685): 1 differential I/O pins do not have complementary pins. As a result, the Fitter automatically creates the complementary pins
    Info (11684): Differential I/O pin "clk_n" does not have a complementary pin. As a result, the Fitter automatically creates the complementary pin "clk_n(n)" File: /home/nithyasri.m/lowphy_validation/top.vhd Line: 8
Error (14566): The Fitter cannot place 2 periphery component(s) due to conflicts with existing constraints (2 I/O pad(s)). Fix the errors described in the submessages, and then rerun the Fitter. The Intel FPGA Knowledge Database may also contain articles with information on how to resolve this periphery placement failure. Review the errors and then visit the Knowledge Database at https://www.intel.com/content/www/us/en/support/programmable/kdb-filter.html and search for this specific error message number.
    Error (175019): Illegal constraint of I/O pad to the location PIN_BC111
        Info (14596): Information about the failing component(s):
            Info (175028): The I/O pad name(s): clk_p
        Error (16234): No legal location could be found out of 1 considered location(s).  Reasons why each location could not be used are summarized below:
            Error (175006): There is no routing connectivity between the I/O pad and destination I/O input buffer
                Info (175027): Destination: I/O input buffer clk_p~input
                Error (175022): The I/O pad could not be placed in any location to satisfy its connectivity requirements
                Error (175022): The destination I/O input buffer could not be placed in any location to satisfy its connectivity requirements
                Info (175029): 1 location affected
                    Info (175029): PIN_BC111
    Error (175019): Illegal constraint of I/O pad to the location PIN_BC107
        Info (14596): Information about the failing component(s):
            Info (175028): The I/O pad name(s): clk_n
        Error (16234): No legal location could be found out of 1 considered location(s).  Reasons why each location could not be used are summarized below:
            Error (175006): There is no routing connectivity between the I/O pad and destination I/O input buffer
                Info (175027): Destination: I/O input buffer clk_n~input
                Error (175022): The I/O pad could not be placed in any location to satisfy its connectivity requirements
                Error (175022): The destination I/O input buffer could not be placed in any location to satisfy its connectivity requirements
                Info (175029): 1 location affected
                    Info (175029): PIN_BC107
Error (15307): Cannot apply project assignments to the design due to illegal or conflicting assignments. Refer to the other messages for corrective action.
Error (16297): An error has occurred while trying to initialize the plan stage.
Error: Quartus Prime Fitter was unsuccessful. 13 errors, 1 warning
    Error: Peak virtual memory: 6151 megabytes
    Error: Processing ended: Mon Aug 11 12:34:36 2025
    Error: Elapsed time: 00:00:58
    Error: System process ID: 206777