What does errno 54 (EXFULL) mean? Status / error code: Category: Constant name: Source: Operating System: Description: Exchange full Could be also: ConstantTypeOS ERROR_NETWORK_BUSYWin32 errorWindows ECONNRESETerrnoMac EBADRQCerrnoSolaris DEVICE_REFERENCE_COUNT_NOT_ZEROBugCheck CodeWindows Looking for a different code? Search another status or error code.