Difference and usage of Bapiname_Input and Bapiname_Output class from RFC

Hi,
When we create a model from RFC adaptive model we will get 2 classes for every RFC as Bapiname_Input and Bapiname_Output. What is the difference between these two. Most of the time we only use Bapiname_Input class for calling rfc by setting the import parameters from webdynpro.when we apply template on component controller and model, it always creates a function
executeBapiname_Input() which does the calling of the rfc using model.execute.So what are the difference between Bapiname_input and Bapiname_output classes and in which case which is used.
Thanks.

Hi,
BAPI_Input : has all the input parameters to the BAPI and also the table parameters.
BAPI_Output : has all the output parameters from the BAPI and also the table parameters. Table is a two way communication, so it is available both in Input and Output Nodes.
Usually we use BAPI_Input because all the import and table parameters are available in this node.
But, when we have to use the export parameters (like the error flags, message text etc) you will have to use the BAPI_Output.
Hope this helps.
--MLS

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