Abap routing in infopackage data selection

Hi guys

I'm using an ABAP routin for the Data selection in my infopackage. I want to fetch all the records which is having value Less than 'IN14' for company code.I have modifuied the l_t_range as shown

l_t_range-sign = 'I'.

l_t_range-option = 'LT'.

l_t_range-low = 'IN14'.

modify l_t_range index l_idx.

But while executing, its giving the followinf error message.

"For sel. field 'COMP_CODE', no selection with SIGN = 'I'; OPTION 'LT' allowed"

Does anybody knows what should be done for this?

Regards

Sriram