Error <system_name>_mm_interconnect_0_addr_router.sv(196): (vlog-2730) Undefined variable: 'write_transaction' - Error <system_name>_mm_interconnect_0_addr_router.sv(196): (vlog-2730) Undefined variable: 'write_transaction' Description Due to a problem in the Quartus® II software version 13.0 and later, a Qsys system that contains an AXI Default Slave but no AXI Slave will not compile and simulate correctly. The following error will be reported during simulation: Modelsim : ** Error <system_name>_mm_interconnect_0_addr_router.sv(196): (vlog-2730) Undefined variable: 'write_transaction' Synopsys VCS : “Error-[IND] Identifier not declared <system_name>_interconnect_0_addr_router.sv, 196 Identifier 'write_transaction' has not been declared yet. If this error is not expected, please check if you have set `default_nettype to none.” Resolution To work around this problem, add a dummy AXI slave in your system. This problem is scheduled to be fixed in a future release of the Quartus II software. Custom Fields values: ['novalue'] Troubleshooting novalue True ['Simulation'] ['FPGA Dev Tools Quartus II Software'] novalue 13.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']