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AR# 22567

XST - When I try to synthesize a design, the following error occurs: "ERROR:Xst:1817 - Invalid target speed '-10'"


When I compile a design to Virtex-4 (previous Virtex-II Pro), after I have changed CONFIG PART in ucf, XST halts with the following error message:

ERROR:Xst:1817 - Invalid target speed '-10'


This error occurs if the device files are not installed correctly.

To double-check the files, run xinfo and look for "summary= selected: <device_name>".

If the device you are targeting cannot be found, then re-install the ISE CD/DVD with that device selected.
AR# 22567
Date Created 09/04/2007
Last Updated 10/05/2011
Status Archive
Type General Article