Error <system_name>_mm_interconnect_0_addr_router.sv(196): (vlog-2730) Undefined variable: 'write_transaction'

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.”

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.