%Warning-ASCRANGE: t/t_interface_array_nocolon_bad.v:26:26: Ascending instance range connecting to vector: left < right of instance range: [0:2] : ... note: In instance 't' 26 | foo_intf foos [N] (.x(X)); | ^ ... For warning description see https://verilator.org/warn/ASCRANGE?v=latest ... Use "/* verilator lint_off ASCRANGE */" and lint_on around source to disable this message. %Warning-ASCRANGE: t/t_interface_array_nocolon_bad.v:27:28: Ascending instance range connecting to vector: left < right of instance range: [1:3] : ... note: In instance 't' 27 | foo_intf fool [1:3] (.x(X)); | ^ %Warning-ASCRANGE: t/t_interface_array_nocolon_bad.v:30:26: Ascending instance range connecting to vector: left < right of instance range: [0:2] : ... note: In instance 't' 30 | foo_subm subs [N] (.x(X)); | ^ %Warning-ASCRANGE: t/t_interface_array_nocolon_bad.v:31:28: Ascending instance range connecting to vector: left < right of instance range: [1:3] : ... note: In instance 't' 31 | foo_subm subl [1:3] (.x(X)); | ^ %Error: Exiting due to