error in posting excise invoice

hi,

i am facing the following error: i have check the settings also and not able to find where the things are missing.

<b>Exc. tax ind. not maint. for 1 J_1IEICOVE - please maintain

Message no. 8I004</b>

Diagnosis

The excise tax indicator is not maintained for the specific combination. The indicator is needed to determine the excise duty rate.

Procedure

Cancel the document.

Maintain the combination with the final indicator in the table.

please help

thanks and regards