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# 8770

3.1i XFLOW - The constraints file (.ucf) in the current directory is not used


Keywords: XFLOW, .ucf, working directory, current directory

Urgency: Standard

General Description:
XFLOW does not use the constraints file (.ucf) located in the current directory if the "-wd" option is used to specify a wokring directory that is different from the current directory.


The "-wd" option is specifies the location of the working directory for XFLOW; this defines where XFLOW and all sub-programs run. If a UCF file is located in a directory that is different from the working directory, it is not automatically used.

To ensure that a UCF constraints file is used by the tools, edit the options file (.opt) and specify the "-uc" option in the NGDBuild program block. The "-uc" option should point to a fully hierarchical path for the UCF constraints file.

This problem was fixed in the 4.1i release.
AR# 8770
Date Created 08/31/2007
Last Updated 06/13/2002
Status Archive