Pack_netfdm (Matlab) causes FG crash

Hallo community,

i am trying to send control surface deflections , position and orientation data , etc from simulink to Flight gear and despite even sending a simple 0 degree for the roll from simulink - the graphics crashes in FG to black

- i use a fairly respectable core i7 Iris Xe graphics, Matlab 2024a

- trying to increase the sample time of data pack - from 0.01 to 1s - but it still crashes

-tried FG2020, 2024, 2024 - issue persists

- even with the Built in Cessna plane - this happens

-also graphics are set to bare minium - no rembrandt - no ALS - once i send a simple signal - the FG crashes to fill black - just the propeller barely visible

please kindly help as i am unable to move further

thanks