Description

Why do I receive this error when running DRCs on my EDK design?

ERROR:EDK:4073 - INSTANCE: axi_interconnect_2, PORT: S_AXI_AWUSER, CONNECTOR: axi_interconnect_2_S_AWUSER - 4 bit-width connector assigned to 2 bit-width port ....

Solution

This error happens when there is a mismatch in port sizes between connected IP.

In this case specifically, it turns out that the AXI interconnect has settings for the AWUSER/ARUSER signals to define their bit widths. 

By default, this is set to auto.

Currently (as of 14.2), setting this to AUTO does not seem to resolve mis-matches.

To work around the issue, right click on the axi_interconnect that is failing, and select "Config IP". 

Under the General tab, change the Read/write Address User Signal Width to match the expected value in the system. 

See below: