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# 9892

3.1i Foundation ISE - Switching Synthesis Tools can result in NCF file errors


Keywords: Project Navigator, XST, FPGA Express, NCF, Constraints

Urgency: Standard

General Description:
When a design is synthesized using XST, an NCF file is always generated.
If the synthesis tool is then changed to FPGA Express and the design is
resynthesized, a new EDIF file is generated. By default, a new NCF is not
generated. If a new NCF is not generated, then NGDBUILD will utilize the
FPGA Express EDIF file and the XST NCF file, resulting in errors.


Delete the old NCF file.
AR# 9892
日付 01/16/2003
ステータス アーカイブ
種類 一般