Agilent Technologies 4288A Programming Manual page 270

Error Messages
Error number: -121
-121 Invalid character in number
An invalid character for the data type of the syntax analysis target has been received. For
example, alphabetical characters exist in a decimal value or "9" exists in octal data.
-123 Exponent too large
The absolute value of the exponent has exceeded 32,000. (Refer to IEEE488.2,7.7.2.4.1.)
-124 Too many digits
The number of digits of the mantissa of the decimal value data element exceeds 255 except
for preceding 0s. (Refer to IEEE488.27.7.2.4.1.)
-128 Numeric data not allowed
A numeric value data element (that does not violate the standard) has been received where
the 4288A does not accept any numeric value data element.
-131 Invalid suffix
The suffix does not meet the syntax defined in IEEE488.2,7.7.3.2 or is inappropriate for
the 4288A.
-138 Suffix not allowed
A suffix is added to a numeric value element that does not permit a suffix.
-140 Character data error
An error not included in the error numbers between -141 and -149 has occurred during the
syntax analysis of a character data element.
-141 Invalid character data
Invalid characters have been found in a character data element or the received parameter is
not valid. For example, though a correct program message was ":CALC1:FORM CP," a
wrong program message, ":CALC1:FORM RP," was received.
-144 Character data too long
The length of the character data element has exceeded 12 characters. (Refer to
IEEE488.2,7.7.1.4.)
-148 Character data not allowed
A character data element (that does not violate the standard) has been received where the
4288A does not accept any character data element.
-150 String data error
An error not included in the error numbers between -151 and -159 has occurred during the
syntax analysis of a string data element.
-151 Invalid string data
Character string data are expected, but the string data received are invalid for some reason.
(Refer to IEEE488.2,7.7.5.2.) For example, the END message is received before the end
quotation mark character appears.
268 Appendix F