The supplier site open...

The supplier site open interface program is getting erred out with below message

AUTO_TAX_CALC_OVERRIDE is invalid

The value in that field is 'Y'
we are using a custom program to load the supplier site interface tables.
The program is being used in the organization for a very long time and we 've never seen this error before

Any one has faced this issue before. Please help

check the tax  over

check the tax  over ride check box in payable options .

.if AUTO_TAX_CALC_OVERRIDE Y  then that check box should also enabled