Internal Error: Sub-system: CGA, File: /quartus/h/cga_family_interface_auto.cpp, Line: 1499 - Internal Error: Sub-system: CGA, File: /quartus/h/cga_family_interface_auto.cpp, Line: 1499 Description When you design your customer's BSP target to Stratix® 10 device in Quartus®II 18.0 and Intel FPGA SDK for OpenCL™ 18.0, you might get the following internal error during top compilation. Internal Error: Sub-system: CGA, File: /quartus/h/cga_family_interface_auto.cpp, Line: 1499 CGA_FAMILY_INTERFACE::set_enum_data called on read-only atom Stack Trace: Resolution This is a bug and has been fixed in Quartus II 18.0.1 version. Custom Fields values: ['novalue'] Troubleshooting FB: 560869; False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 18.0.1 18.0 ['Stratix® 10 TX FPGA'] ['HLD Tools OpenCL'] ['novalue'] ['novalue']