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AR# 9219

2.1isp6 XC9500 Family Hitop - Dr. Watson when executing hitop.exe

Description

Keywords: Fitter, fit, crash, Dr. Watson, hitop, hitop.exe, 9500XL,
Webpack

Urgency: Standard

General Description: When running a design through either
Foundation 2.1i_sp6 or Webpack 2.1 WP6.x, the fitter crashes
on Win95, Win98, and gives a Dr. Watson for hitop.exe on WinNT.
This was seen for designs targeting XC9500 family devices.

2.1i_sp6 running WinNT:
Dr. Watson hitop.exe Exception: access violation (0xc0000005),
Address: 0x00449907

Webpack 6.1 running WinNT:
Dr. Watson hitop.exe Exception: access violation (0xc0000005),
Address: 0x00449ee7
Done: failed with exit code: 0002.

Solution

In one case, bidirectional I/O was used with no logic on the
tristate's OE. This is seen in the translation report as follows and
will cause the fitter to crash:

WARNING:NgdHelpers:332 - logical net "OE" has no driver

This is fixed in 3.1i. The workaround is to ensure that
the output enables are connected to a logic (it may be VCC or GND).
AR# 9219
Date Created 05/04/2000
Last Updated 09/06/2001
Status Archive
Type General Article