NOT_MAPPED "file not mapped"
ALREADY_MAPPED "file already mapped"
BAD_SIZE "invalid size specified"
-TRUNC "failed to truncate file"
BAD_TABLE "table not open"
BAD_TABLE_DESC "invalid table description"
RB_KEY_EXISTS "key already exists in rbtree"
BAD_ROW_NUM "invalid row number"
INDEX_CORRUPTION "index corruption detected"
INVALID_OBJECT "reference to invalid object"
-STAT "can not stat file"
LSEEK "lseek error"
BUSY "table is busy"
SHORT_TABLE "table too short"