Hexadecimal Use : Concatenate in 4.6C :- Invalid in ECC

Hi Experts

In 4.6c Version, program is using statement

DATA :l_tab type X value '09',

X(10),

Y(12),

Z(11).

concatenate X Y Z into A separated by l_tab.

constants: con_cret type x value '0D'.

concatenate con_cret A into A.

Now the Concatenate of Hexadecimal and Character data type is invalid in ECC.

Can any one help in this case, I need the separater as the data in variable A is being passed objbin for the function module

call function 'SO_NEW_DOCUMENT_ATT_SEND_API1'