Hi nayeem, pawan,
for your clarification,
in custom include CI_EBANDBX i have added another .include structure with name say zzci_XXXX and it has fields of type BAPIUPDATE which is character 1.
my problem is solved but i am not sure what i did was right or not!!
i changed enhancement category of CI_EBANDBX as "Not classified" and zzci_XXXX include structure enhancement category as "Cannot be enhanced", i basically copied these from CI_EBANDB custom include of MEREQ_ITEM structure.
is there any rule for the enhancement category of the custom include ci or how to go about this ??