Relationship between inf0016 and absence quota generation

Hi Guys,

i've created abap program to help employee creating leave request before updating to infotype 2001,

but this error "no authorization for infotype 0016" keep showing, i don't know if there's any relationship between quota generation and this infotype,

FYI, i run PT60 to generate absence quota in 2006

please help me, thanks before 😊