: On some devices, such as Keithley SMUs , being in the wrong command mode (e.g., TSP instead of SCPI) can cause this error when using standard drivers. How to Fix It -420 Query Unterminated on Target Machine - NI Community
Before we fix the error, we must understand the language of the database. The "420" code is not random. In the SQL standard (and most vendor-specific implementations), error classes starting with generally indicate a syntax error or access violation . 420 query unterminated