I am trying to generate a UCF file for the PCI core from the UCF Generator tool, but this is grayed out, or I get the warning below when opening the tool:
WARNING: coreutil:752 - Cannot create 'xilinx.com:ip:pciucfgen:2.8' - executable path 'com\xilinx\ip\pciucfgen_v2_8\bin\nt64' not found.
WARNING: coreutil:948 - Unable to load element 'xilinx.com:ip:pciucfgen:2.8' from repository
Is this a known issue?
Yes, this is a known issue due to missing files during the installation.
With the latest versions of ISE tools, the executable files for the "UCF Generator for PCI/PCI-x" are missing from the core folder.
More specific, the "bin" folder which contains the executables for 32 and 64 bits.
Those folders can be copied from a previous ISE tool version (14.1) or downloaded from this answer record below.
Unzip these files inside the IP core folder with the "data" and "doc" folders. Below are the paths from a default installation: