API for Activity Association

Previously I run API for Activity Association (EAM_ITEM_ACTIVITIES_PUB.INSERT_ITEM_ACTIVITIES) and working properly.  Today I run the same script for new Activity Association, but i got error message:

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Invalid Descriptive FlexField data. Program error: Please inform your support representative that:

FLEXFIELDS SERVER-SIDE VALIDATION package reports error:

validate_desccols() exception: ORA-20005: DVLB.get_default_context() failed. SQLERRM: ORA-01403: no data found

ORA-06512: at "APPS.FND_FLEX_DESCVAL", line 931

ORA-01403: no data found

Return Status - E

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The script as shown below

set serveroutput on

DECLARE

O_return_status VARCHAR2(50);

O_msg_count NUMBER;

O_msg_data VARCHAR2 (2000);