SAP JCo needs to know the meta data of the function module it mimics. This includes e.g. parameters, typing etc. Hence, JCo by default checks the data dictionary (DDIC) of an SAP NetWeaver ABAP.

Step 4 in this tutorial does not use ' ' for the values to create by communication arrangement. It might be misleading. In addition, this is the first mission in the tutorial, so it makes the ...