Description
Due to a problem in the Quartus® II software version 10.0 and later, you may see this error if you use a Tcl script to archive your design as part of the compilation flow. In this situation, the Quartus II archive logfile <archive name>.qarlog indicates that it failed to archive a file with the extension .flock.
Resolution
It is not necessary to include the .flock file in the Quartus II archive. To avoid the error, modify your Tcl script to rename the .flock file before running the project_archive
command, and then rename the .flock file to its original name afterwards. For example, your Tcl script might include the following commands:
set flock_name [glob db/*.flock]
file rename "hide"
project_archive
file rename "hide"
This problem is scheduled to be fixed in a future release of the Quartus II software.