User`s manual

B-2
Explanation of Error Messages
NF NEXT without FOR: NEXT is used without a matching FOR statement. This error may also
occur if NEXT
variable
statements are reversed in a nested loop.
SN Syntax Error: This usually is the result of incorrect punctuation, open parenthesis, an illegal
character or a mis-spelled command.
RG RETURN without GOSUB: A RETURN statement was encountered before a matching GOSUB
was executed.
OD Out of Data. A READ or INPUT # statement was executed with insufficient data available.
DATA statement may have been left out or all data may have been read from tape or DATA.
FC Illegal Function Call: An attempt was made to execute an operation using an illegal
parameter. Examples: square root of a negative argument, negative matrix dimension,
negative or zero LOG arguments, etc. Or USR call without first POKEing the entry point.
OV Overflow: The magnitude of the number input or derived is too large for the Computer to
handle. NOTE: There is no underflow error. Numbers smaller than ± 1.701411E-38 single
precision or ± 1.701411834544556E-38 double precision are rounded to 0. See /0 below.
OM Out of Memory: All available memory has been used or reserved. This may occur with very
large matrix dimensions, nested branches such as GOTO, GOSUB, and FOR-NEXT Loops.
UL Undefined Line: An attempt was made to refer or branch to a non-existent line.
BS Subscript out of Range: An attempt was made to assign a matrix element with a subscript
beyond the DIMensioned range.
DD Redimensioned Array: An attempt was made to DIMension a matrix, which had previously
been dimensioned by DIM or by default statements. It is a good idea to put all dimension
statements at the beginning of a program.
/0 Division by Zero: An attempt was made to use a value of zero in the denominator. NOTE: If
you can't find an obvious division by zero check for division by numbers smaller than allowable
ranges. See OV above and RANGES page A/17.
ID Illegal Direct: The use of INPUT as a direct command.
TM Type Mismatch: An attempt was made to assign a non-string variable to a string or vice-versa.
OS Out of String Space: The amount of string space allocated was exceeded.