UJF-6042 901 Error code (what am I doing Wrong)

This is a new (Old ) machine for me - I have its twin which works fine - This one Boots up fine, no errors , everything looks fine , Good inks , work height is set, When I Do a test print its gives a 901 error code - resets Gives the error code whenever I try to test print or do a regular print . When I do a Parameter Draw from the test menu it Prints a wide black bar all the way down the page. Im a bit stumped . Anyone seen this before ?

 

Problem Resolved , Previous owners replaced Main Pcb and Slider pcb and did not have the parameters & settings loaded into the new boards . Put the old boards back in and it works and does test prints . Life is good again .