Table type conflict in smartforms

Hello SDNers,

I was working on smart forms.

In smart forms under Form interface -> tables

I have declared a parameter called t_emp type znrd_t_emp.

where znrd_t_emp is a table type and ZNRD_S_EMP is a line type.

Now in the driver program which calls the smart forms has a work area and a internal table

data : w_emp type s_emp,

it_emp type table of s_emp.

where s_emp is a type in the program.

in the program I am handling an exception and when doing so it shows a type compatible error.

Error : A type conflict occured when the program tried to pass the actual parameter to the formal parameter 'T_EMP' of the function /BCDWB/SF00000139.

Now what modification should I do in the smart forms to get rid of this error.

Please help.

Thanks and regards,

Ranjith N