Hi, all. Need some information regarding Rohde & Schwarz RMS Voltmeter URE2. I issued command like what stated in the manual, for example: Command: Result/Output 0010: *CLS 0020: ERRORS? 0 0030: *IDN? ROHDE & SCHWARZ, URE2, Firmwarevers.: 3.2 0040: ERRORS? 199 What i concerned here is why the code on 0040: ERRORS? will output the error code 199 where i only acquire simple SCPI command? Or do i need to specify something on command or i need to do issue some initialise commands at the begining of the program? I keep seeing the error code 199 and 68 after i issued the command to the instrument, even though the LCD display on the ROHDE & SCHWARZ URE2 will still shown COMMAND ACCEPT. Kinda confusing... Can anybody help me on this because i found that there is so so limited resources regarding to this model of instrument.... Thanks..