Delete adjacent duplicates

Hi Team ,

I have been strugguling with a typical issue .

Our Production system has been migrated from Window to Unix ( Os 400 ) system , In one of the report the below code works differenctly .

sort t_lqua by werks matnr.
delete adjacent duplicates from t_lqua comparing all fields.

In one production system the T_tqua is a result of 142 records and other sytem it is giving 129 records there is a data loss of 13 records . Some one can please help me on how to solve this issue .

Regards,

K.Vinay Kumar .