描述

I am receiving the following Fatal Error in my design when I run Place and Route:

Phase 7.8  Global Placement
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FATAL_ERROR:Place:PlXil_Uapflow1.c:805:1.176 - Pl_Uap_Flow1FitterRuleFastFeedbacks: bad index to sec_nodes array. 
   Process will terminate. For technical support on this issue, please open a WebCase with this project attached at
   http://www.xilinx.com/support.

解决方案

This is a known issue and has been found to occur in ISE 13.x and 14.x.

The work-arounds are as follows:

1. Avoid using "-cm speed" in the MAP options.
2. Use the recommended flow of "-timing" in the MAP properties, this is the default flow for newer architectures and will allow you to use "-cm speed" if required.
3. For older architectures, using the new XST parser can also avoid this Fatal Error.
   Add "-use_new_parser yes" to the XST command line options.