UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 14240

4.1i XST - "ERROR:Xst:792 - file_name.vhd Line xx: Index -1 is not in range of signal my_signal"

Description

Keywords: XST, 792, index, range

Urgency: Standard

General Description:
When I synthesize with XST, the following error message is reported:

"ERROR:Xst:792 - file_name.vhd (Line xx). Index -1 is not in range of signal my_signal."

Solution

This problem occurs when a constant variable is passed from a higher-level module to a lower-level module.

To work around this issue, change the constant to a signal, then pass this signal to the lower-level module.

This problem has been fixed with the release of software version 5.1i.
AR# 14240
Date Created 08/29/2007
Last Updated 08/06/2003
Status Archive
Type General Article