AP Freight Line Allocation Issue

Hi,

We are prorating/allocating Freight amount to the invoice ITEM line. we have written a personalization to automatically enable PRORATE_ACROSS_ALL_ITEMS on the Freight Line. We are seeing this issue where Freight line is allocated but the generate_dists field value is set to "N", so even though Freight line is allocated, Freight Distribution is not created.

Could you please guide me on what might be the issue here ?

when we user clicks on prorate check box on the Freight line , it works and generates the distribution.

But when the PRORATE_ACROSS_ALL_ITEMS field value is set to "Y" and default distribution is NULL on the Freight line then it's not working.