Customer Exit Variable CP Option

Hi,

we ha ve created a customer exit variable ZVAR_CP (Detail Select Option, Optional) on Characteristic defined as a char (6)

The code to fill this variable is:

WHEN 'ZVAR_CP'.

l_s_range-sign = 'I'.

l_s_range-opt = 'CP'.

l_s_range-low = 'F*'.

APPEND l_s_range TO e_t_range.

ENDIF.

Executing the query with this variable we obtain this message: CP in variable 'ZVAR_CP' is not supported; characteristic is numeric, but in the system the characteristic related to the variable IS NOT NUMERIC.

Any idea? We need to filter all master data value that begin with F. Why CP option give error?

Thanks,

Veronica