A read-only counter of errors that occurred when the convergence port attempted to register itself with the internal framework. Registration failures can prevent a convergence port from being recognized by the system at all, so an admin checks this counter when a port seems to be missing from expected configuration views. If a newly installed convergence port never appears fully configured and cxFwkStatsRegistrationErrors is incrementing, the admin would suspect a framework registration problem rather than a cabling issue.