SAP Note 11508 - IS-H:Runtime error CALL_FUNCTION_NOT_FOUND.

Symptom

The runtime error CALL_FUNCTION_NOT_FOUND occurs with copayment/down payment.

Cause and prerequisites

From IS-H, copayments and down payments are processed using the SmartCall method, in other words processing is event-controlled via communication tables. If a configuration is not found for an event (for example post copayment), the transaction or the report outputs a corresponding error message.
If however the function module entered in the configuration table does not exist in the system (for example, incorrect syntax), a runtime error occurs since the transaction only checks whether a configuration in fact exists, and not whether its contents are correct.

Solution
There is probably an incorrect table entry in table TN02K: the name of the function module is written incorrectly. Analyze dump; which function module should be called.
Check and execute the function configuration (RNKONFIG), and check whether the function modules exist. If need be, you can use the entries in client 000 for comparison purposes.

Additional key words

Copayment, down payment, NE11, NE20, SAPLN019

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