Agilent Technologies 4155C Command Reference Manual page 419

Error -150
Error -151
Error -158
Error -160
Error -161
Error -168
Error -170
Error -171
Error -178
String data error
An error was detected in a string parameter. This error is reported if the
4155C/4156C cannot determine a more specific error -151 and -158.
Invalid string data
An invalid string parameter data was received; for example, an END message was
received before the terminal quote character.
String data not allowed
A string parameter data was received but was not allowed at this point.
Block data error
An error was detected in a block data. This error is reported if the 4155C/4156C
cannot determine more specific errors -161 and -168.
Invalid block data
An invalid block data was received; for example, an END message was received
before the length was satisfied.
Block data not allowed
A legal block data was received but was not allowed at this point.
Expression error
An error was detected in an expression. This error is reported if the 4155C/4156C
cannot determine more specific errors -171 and -178.
Invalid expression
The expression was invalid; for example, unmatched parentheses or an illegal
character.
Expression data not allowed
An expression was received but was not allowed at this point.
Agilent 4155C/4156C SCPI Command Reference, Edition 1
Error Messages
Command Error
6-7