Message Oracle RMAN-06434 - some errors occurred while removing recovery catalog

ERRORsome errors occurred while removing recovery catalog
CAUSESome errors were received from the recovery catalog database while removing the recovery catalog.
ACTIONCorrect the error(s) and retry the command. Note that Recovery Manager intercepts and ignores common errors, such as object not found, which can happen while removing a partially installed recovery catalog. Only serious errors will be displayed while removing the recovery catalog.