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# 18955

LogiCORE SPI-4.2 (POS-PHY L4) v6.1 - NetGen: "FATAL_ERROR:Anno:ProgToTime.c:619: - D_OBUF_BASE+D_OBUF_ADJ resulted in a NEGATIVE delay value of (-14:-14:-14)"


General Description

When I run HDL back-annotation (NetGen) on a post-PAR SPI4.2 design that targets Virtex-II Pro architecture, the following error is reported:

"FATAL_ERROR:Anno:ProgToTime.c:619: - D_OBUF_BASE+D_OBUF_ADJ resulted in a NEGATIVE delay value of (-14:-14:-14) Process will terminate. To resolve this error, please consult the Answers Database and other online resources at http://support.xilinx.com.If you need further assistance, please open a WebCase by clicking on the "WebCase" link at http://support.xilinx.com"


This error occurs when NetGen is run with "-ngm" option used.

Example NetGen commands:

netgen -sim -ofmt vhdl -w -tm pl4_wrapper -ngm mapped.ngm routed.ncd


netgen -sim -ofmt verilog -w -tm pl4_wrapper -ngm mapped.ngm routed.ncd

This is a NetGen tool issue. To work around it, run NetGen without using the "-ngm <ngm_file>" option.

AR# 18955
Date 12/15/2012
Status Active
Type General Article