Error Codes (⎕ET)

Error types reported by ⎕ET are listed below. Note that some codes are unassigned.

      0 0    NO ERROR
      0 1    UNKNOWN ERROR
      0 2    DEFN ERROR
      1 1    INTERRUPT
      1 2    SYSTEM ERROR
      1 3    WS FULL
      1 4    SYSTEM LIMIT  SYMBOL TABLE
      1 8    SYSTEM LIMIT  ARRAY RANK
      1 9    SYSTEM LIMIT  ARRAY SIZE
      1 10   SYSTEM LIMIT  ARRAY DEPTH
      1 11   SYSTEM LIMIT  PROMPT LENGTH
      1 12   SYSTEM LIMIT  UNASSIGNED
      1 13   SYSTEM LIMIT  TOKEN LIST LIMIT
      2 1    SYNTAX ERROR  OPERAND OR RIGHT ARGUMENT OMITTED
      2 2    SYNTAX ERROR  ILL FORMED LINE
      2 3    SYNTAX ERROR  NAME CLASS
      2 4    SYNTAX ERROR  INVALID IN CONTEXT/NONCE ERROR
      2 5    SYNTAX ERROR  COMPATIBILITY SETTING PREVENTS THIS
      2 10   SYNTAX ERROR  STRUCTURED-CONTROL ERROR
      3 1    VALUE ERROR   NAME WITH NO VALUE
      3 2    VALUE ERROR   FUNCTION WITH NO RESULT
      5 1    VALENCE ERROR
      5 2    RANK ERROR
      5 3    LENGTH ERROR
      5 4    DOMAIN ERROR
      5 5    INDEX ERROR
      5 6    AXIS ERROR
      6 1    FILE ERROR   UNAUTHORISED FILE ACCESS
      6 2    FILE ERROR   FILE NOT IN SYSTEM
      6 3    FILE ERROR   COMPONENT NOT IN FILE
      6 4    FILE ERROR   FILE ALLOCAION EXCEEDED
      6 5    FILE ERROR   FILE OR COMPONENT HELD
      6 6    FILE ERROR   FILE MAINTENANCE IN PROGRESS
      6 7    FILE ERROR   USER ALLOCATION EXCEEDED
      6 8    FILE ERROR   FILE IN EXISTENCE
      6 9    FILE ERROR   FILE I/O ERROR
      6 10   FILE ERROR   DISK FULL
      6 11   FILE ERROR   USER NOT IN SYSTEM
      6 12   FILE ERROR   DATA DAMAGED
      6 13   FILE ERROR   FILE LOCKED
      6 14   FILE ERROR   LOGICAL UNIT NOT FOUND