Getting an error during incompletion check for having more than 999 items in export dec

Hello Experts,

I am getting an error in export declaration (US) during in-completion check for having more than 999 items in declaration. I have maintained the item aggregation for electronic message and defined the schema for US AES.

Also I could see the items getting aggregated during simulation but on executing the message (processing the declaration), system is giving an error for having more than 999 items in declaration.

Please let me know if you have see this error or if I am missing some config.

Regards,

Naveen