Supply Chain Cost Rollup Errors - need IDMS process internals expertise

We have been experiencing Supply Chain Cost Rollups ending in Error due to a lock being held on one of the cost tables by another process, despite implementing suggestions from notes 2106359.1 and 2198257.1 and having added personalizations to form CSTFITCT/function CST_CSTFITCT to lock out cost updates if such a concurrent request is executing.

SR 3-24235489011 produced patch 33074934 which added the following code to the package CSTPSCCR:

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FUNCTION list_locked_sessions (

     i_tabname IN VARCHAR2)

    RETURN VARCHAR2 IS

    l_status       VARCHAR2(1);

    l_industry      VARCHAR2(1);

    l_oracle_schema    VARCHAR2(30);

    l_return       BOOLEAN;

 BEGIN

    l_return := FND_INSTALLATION.get_app_info