Error (13224): Verilog HDL or VHDL error at <kernel_filename>.v: ansi port p_avm_printf_addrhello_world_enable cannot be redeclared - Error (13224): Verilog HDL or VHDL error at <kernel_filename>.v: ansi port p_avm_printf_addrhello_world_enable cannot be redeclared Description In the Intel® FPGA SDK for OpenCL™ version 17.1, you may see this error while calling a printf () inside a kernel with attribute num_compute_units(). Resolution To avoid this error, perform either of the following actions: manually replicate printf calls inside the kernel replace printf with channel calls that send data to a non-compute-id kernel which in turn performs the printfs. This is fixed in the Intel FPGA SDK for OpenCL version 18.0 Custom Fields values: ['novalue'] Troubleshooting FB: 547074; False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 18.0 17.1 ['Programmable Logic Devices'] ['HLD Tools OpenCL'] ['novalue'] ['novalue']