Internal Error: Sub-system: FPP, File: /quartus/periph/fpp/fpp_design.cpp, Line: 213 Port OPORT_BUFFEROUT already exists on IO_CLUSTER cell 177

Description

You may see this error message when targeting Intel® Stratix® 10 MX devices in Intel® Quartus® Prime Pro Software version 18.0.1 and you have a design that includes two instances of the eSRAM Intel® FPGA IP, and both of the cases share a common reference clock signal.

Each eSRAM Intel® FPGA IP instance requires a dedicated reference clock due to its physical placement on the device.

Resolution

To work around this problem, provide a dedicated reference clock to each eSRAM Intel® IP instance in the design. Please refer to the Intel® Stratix® 10 Device Family Pin Connection Guidelines for more information about the eSRAM Intel® IP pin requirements.

A more meaningful error message is generated starting with the Intel® Quartus® Prime Software version 22.3.