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IDoc sending to XI from external java program with JCO fails


when I try to send an IDoc from an external java program using the JCO library to XI I get the following exception:

(104) RFC_ERROR_SYSTEM_FAILURE: No service for system ASC_EXT, client  in Integration Directory

But I have in the Integration Directory a business system with a receiver communication channel of adapter type IDoc with my RFC destination and the port ASC_EXT created. The connection between java program and XI is enabled (connection test in SM59 and calling is successful).

Does anybody know, what is missing in the configuration?

Best regards.

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