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# 34179

11.4 XST - "ERROR:NgdBuild:604 - logical block..."


Thefollowing error occursin NGDBuild when I attempt to synthesize EtherCAT IP Core:

"ERROR:NgdBuild:604 - logical block <instance name> with type <component> could not be resolved. A pin name misspelling can cause this, a missing edif or ngc file, or the misspelling of a type name. Symbol <name> is not supported in target <device>."

How do I fix the problem?


This issue is caused by an XST bug in 11.4.

To fix this issue, download the following patch:


Extract the attached ZIP file to the $XILINX folder.

Example : WIN : C:\Xilinx\11.1\ISE\
Linux : $XILINX/data/

Run XST againand the implementation tools.

This issue is scheduled to befixed in ISE 12.1.

AR# 34179
Date 05/19/2012
Status Active
Type Known Issues
  • ISE Design Suite - 11.4
Page Bookmarked