In this example Emad mentioned,vendor payment term specifies 3 % discount for 14 days. It's assumed that the user tolerance group is blank by default in oba4.The cash discount per line item is specified as zero and that's the reason the user is getting the error message that "Cash discount may be only be granted up to 0.000%"
The end user who post vendor payment must have authorization to allow 3% discount. To grant that privilege, as the above picture indicates,please go to oba4 - Cash discount per line item,input a percentage greater than the discount specified in the payment term. For eg: 10% . Save it and make the payment again. You will be good.Thanks
Regards,
Sam