Commodore 64 User Manual page 161

LOAD
There is a problem with the program on tape.
NEXT WITHOUT FOR This is caused by either incorrectly nesting loops
or having a variable name in a NEXT statement that doesn't correspond
with one in a FOR statement.
NOT INPUT FILE
An attempt was made to INPUT or GET data from a
file which was specified to be for output only.
NOT OUTPUT FILE An attempt was made to PRINT data to a file which
was specified as input only.
OUT OF DATA A READ statement was executed but there is no data
left unREAD in a DATA statement.
OUT OF MEMORY There is no more RAM available for program or
variables. This may also occur when too many FOR loops have been
nested, or when there are too many GOSUBs in effect.
OVERFLOW
The result of a computation is larger than the largest
number allowed, which is 1.70141884E+38.
REDIM' D ARRAY An array may only be DiMensioned once. If an array
variable is used before that array is DIM'd, an automatic DIM operation
is performed on that array setting the number of elements to ten, and
any subsequent DIMS will cause this error.
REDO FROM START Character data was typed in during an INPUT
statement when numeric data was expected. Just re-type the entry so
that it is correct, and the program will continue by itself.
RETURN WITHOUT GOSUB A RETURN statement was encountered,
and no GOSUB command has been issued.
STRING TOO LONG A string can contain up to 255 characters.
?SYNTAX ERROR
A statement is unrecognizable by the Commodore
64. A missing or extra parenthesis, misspelled keywords, etc.
TYPE MISMATCH
This error occurs when a number is used in place of a
string, or vice-versa.
UNDEF' D FUNCTION
A user defined function was referenced, but it
has never been defined using the DEF FN statement.
UNDEF' D STATEMENT An attempt was made to GOTO or GOSUB or
RUN a line number that doesn't exist.
VERIFY The program on tape or disk does not match the program cur-
rently in memory.
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