SAP EP – Netweaver Portal

Symptom

High memory consumption when calling certain function modules that has the nested table structure UWLITEMLIST.
Other terms

UWLITEM, UWLDYNATTRLIST, ADDTL_ATTRIBUTES, Initialization and Access
Reason and Prerequisites

In case of a table within table parameter, if data for ‘Initialization and Access’ is not configured explicitly, memory allocated for number of initial lines is calculated by the system according to some system settings. Potentially, unknown number of lines are defined and memory consumption can be a lot higher than what is actually required.

Solution

Import the referenced support package.
SAP Basis component
700 SAPKB70005
640 SAPKB64015

Or to do this manually, user can try to edit in transaction SE11, bring up definition for table type ‘UWLDYNATTRLIST’, set a number, e.g. 5 for initial lines -> tab ‘Initialization and Access’ -> ‘Initial Line Number’.