ID:14631 Unable to find a legal periphery placement

CAUSE: The Fitter is unable to find a legal placement for all periphery components, and has terminated its search. The placement with the most placed components has been restored. Constraints preventing placement of the remaining components will be summarized following this message.

ACTION: Review the following errors for more details. The failure may be due to unresolvable conflicts between design constraints, in which case modifying the design or existing constraints may be necessary. Alternatively, a solution may exist but may be difficult for the Fitter to find automatically. If possible, providing additional location or clock constraints may allow the Fitter to find the solution, or provide more details in subsequent error messages on why those constraints cannot be followed.