If we are creating the Executable for the Database objects then Application is not very important but We are Creating the concurrent program Executable for those objects which we are keeping not in the Data base but in the application Top folders then selecting the right application is critical Step.
For Example, if you have put the RDF report in the AP_TOP reports folder but in the concurrent program Executable you have selected the “Purchasing” then your concurrent program will go in to error and Oracle AOL will not be able to link this report because as per the concurrent program Executable registration AOL will find this report in the Purchasing Top under reports folder. To make this Correct, you must choose the Application “Payables” in the concurrent program Executable or Put the Report source code from AP_TOP to PO_TOP reports folder.