HANA 2.0 upgrade error [314]: numeric overflow: search table error: [6944]

One of the table functions that converts UTC to local time zone is failing with error: [314]: numeric overflow: search table error: [6944] AttributeEngine: overflow in numeric calculation Tried to use DATETIME_SAP instead of DATETIMESTAMP but the issue remains. Does anybody saw this error before? With HANA 1.0 SP10.2 the table function works fine. Thanks.