An <error/event number> in the range [ -299 , -
200 ] indicates that an error has been detected by 
the instrument’s execution control block. The 
occurrence of any error in this class shall cause the 
execution error bit (bit 4) in the event status 
register (IEEE 488.2, section 11.5.1) to be set. One of 
the following events has occurred: 
  A <PROGRAM DATA> element following a 
header was evaluated by the device as outside 
of its legal input range or is otherwise 
inconsistent with the device’s capabilities. 
  A valid program message could not be properly 
executed due to some device condition. 
Execution errors shall be reported by the device 
after rounding and expression evaluation 
operations have taken place. Rounding a numeric 
data element, for example, shall not be reported as 
an execution error. Events that generate execution 
errors shall not generate Command Errors, device-
specific errors, or Query Errors; see the other error 
definitions in this section. 
This is the generic syntax error for devices that 
cannot detect more specific errors. This code 
indicates only that an Execution Error as defined in 
IEEE 488.2, 11.5.1.1.5 has occurred.