Keysight E4981A Programming Manual page 378

Error Messages
Error Messages (Order of Error Number)
-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 d igits
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 E4981A 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 E4981A.
-134 Suffix too long
The length of suffix is long.
-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
A character data element has been recieved where E4981A does not accepts
any character data element.
-148 Character data not allowed
Character data not allowed for this operation.
-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.
378 Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter