I have a Vivado project that contains an IP Integrator board design (.bd) file.
If for some reason the project is opened and the .bd file is not found (e.g., the project gets moved without sources), the bd file is still displayed in the Hierarchy view.
Other source type files will be shown in red type if the files are not found.
If all of the files are taken out of a project, the BD files do not show up as being not found in the sources hierarchy view.
This is a Vivado IDE display issue.
When the project is opened, a message is correctly displayed indicating that the .bd file is not found.
CRITICAL WARNING: [Project 1-19] Could not find the file 'C:/projects/project_1/project_1.srcs/sources_1/bd/subsystem_1/subsystem_1.bd'.
If a user tries to open the missing .bd file from the hierarchy view, a message similar to the following appears:
[BD 41-1296] Cannot read BD file <C:/projects/project_1/project_1.srcs/sources_1/bd/subsystem_1/subsystem_1.bd>, check for the correct location of the file.
This issue has been resolved in Vivado Design Suite 2014.1.