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AR# 10723

3.1isp6 XST Verilog - ERROR: "Bad Index In DomList (Function ListDelShift) ABORT: (MAIN_0027)."

Description

Keywords: XST, case, concatenate, control, signals, Verilog, Index, function, DomList

Urgency: Standard

General Description:
I am synthesizing a case (or casex or casez) statement in XST Verilog in which two or more control signals are being concatenated as shown:

case ( {sel_a, sel_b})

I am encountering the following error:

ERROR: Bad Index In DomList (Function ListDelShift)
ABORT: (MAIN_0027).
INTERNAL ERROR

Solution

Combine the two control signals into one control signal bus; or, make the case statement only operate based on one control signal and within each branch of the case statement. Check the status of the other control signal(s) using another case statement or an if/then clause.

NOTE: This problem is fixed in the 4.1i software release.
AR# 10723
Date Created 01/04/2001
Last Updated 08/19/2002
Status Archive
Type General Article