Troubleshooting           RIGOL 
User’s Guide for DSA1000 Series 
5.2.2  Error Message 
5.2.2.1  Command Error 
 
This is a generic syntax error for devices that cannot detect more 
specific errors. This code indicates only that a Command Error as 
defined in IEEE 488.2,11.5.1.1.4 has occurred. 
-101  Invalid character. 
A syntactic element contains a character which is invalid for that type; 
for example, a header containing an ampersand, SETUP&. This error 
might be used in place of errors -114, -121, -141, and perhaps some 
others. 
-102  Syntax error. 
An unrecognized command or data type was encountered; for example, 
a string was received when the device does not accept strings. 
The parser was expecting a separator and encountered an illegal 
character; for example, the semicolon was omitted after a program 
message unit, *EMC 1:CH1:VOLTS 5. 
-104  Data type error. 
The parser recognized a data element different than one allowed; for 
example, numeric or string data was expected but block data was 
encountered. 
A Group Execute Trigger was received within a program message (see 
IEEE 488.2, 7.7). 
-108  Parameter not allowed. 
More parameters were received than expected for the header; for 
example, the *EMC common command only accepts one parameter, so 
receiving *EMC 0, 1 is not allowed. 
Fewer parameters were received than required for the header; for 
example, the *EMC common command requires one parameter, so 
receiving *EMC is not allowed.