What does Windows error code 122 (ERROR_INSUFFICIENT_BUFFER) mean? Status / error code: Category: Constant name: Source: Operating System: Description: The data area passed to a system call is too small. Could be also: ConstantTypeOS EOPNOTSUPPerrnoSolaris ENOMSGerrnoWindows KERNEL_DATA_INPAGE_ERRORBugCheck CodeWindows Looking for a different code? Search another status or error code.