| Code |
Meaning |
Situations |
| 0 |
Successful completion, or jump to line number bigger than any existing. A report with code 0 does not change the line number used by CONT. |
Any |
| 1 |
The control variable does not exist (has not been set up by a FOR statement) but there
is an ordinary variable with the same name. |
NEXT |
| 2 |
An undefined variable has been used.
For a simple variable this will happen if the variable is used before it has been
assigned to in a LET statement.
For a subscripted variable it will happen if the variable is used before it has been dimensioned in a DIM statement.
For a control variable this will happen if the variable is used before it has been set up as a control variable in a FOR statement, when there is no ordinary simple
variable with the same name. |
Any |
| 3 |
Subscript out of range.
If the subscript is hopelessly out of range (negative, or bigger than 65535) then
error B will result.
|
Subscripted variables |
| 4 |
Not enough room in memory. Note that the line number in the report (after the /) may be incomplete on the screen, because of the shortage of memory: for instance 4/20 may appear as 4/2. See chapter 23. For GOSUB see exercise 6 of chapter 14. |
LET, INPUT, DIM, PRINT, LIST, PLOT, UNPLOT, FOR, GOSUB.
Sometimes during function evaluation. |
| 5 |
No more room on the screen. CONT will make room by clearing the screen. |
PRINT, LIST. |
| 6 |
Arithmetic overflow: calculations have led to a number greater than about 1038. |
Any arithmetic |
| 7 |
No corresponding GOSUB for a RETURN statement. |
RETURN |
| 8 |
You have attempted INPUT as a command (not allowed). |
INPUT |
| 9 |
STOP statement executed. CONT will not try to re-execute the STOP statement. |
STOP |
| A |
Invalid argument to certain functions. |
SQR, LN, ASN, ACS |
| B |
Integer out of range. When an integer is required, the floating point argument is rounded to the nearest integer. If this is outside a suitable range then error B results.
For array access, see also report 3. |
RUN, RAND, POKE, DIM, GOTO, GOSUB, LIST, LLIST, PAUSE, PLOT, UNPLOT, CHR$, PEEK, USR
Array access |
| C |
The text of the (string) argument of VAL does not form a valid numerical expression. |
VAL |
| D |
(i) Program interrupted by BREAK.
(ii) The INPUT line starts with STOP. |
At end of any statement, or in LOAD,
SAVE, LPRINT, LLIST or COPY.
INPUT |
| E |
Not used |
|
| F |
The program name provided is the empty string. |
SAVE |
