The Clock Reconvergence Pessimism Removal (CRPR) mode has been disabled. It is not recommended to perform timing analysis in this mode as over-pessimistic clock tree delays could result in impossible timing closure.
The CRPR feature is used to remove artificially induced pessimism that is derived from the usage of the maximum and minimum delay along the common portion of the clock network. If the CRPR is disabled, it might be difficult to close timing.