curves didn't define variables (?)

[wintry osprey]

i tried spawning my particle but it threw some weird errors

[Molang][error]-Error: unhandled request for unknown variable 'variable.startx'

[Molang][error]-Error: unhandled request for unknown variable 'variable.starty'

[Molang][error]-Error: unhandled request for unknown variable 'variable.deltax'

[Molang][error]-Error: unhandled request for unknown variable 'variable.deltay'

i have no idea what went wrong

curves didn't define variables (?)