As i want to call external webservice provided by other sap through PO, when i tested the scenario ，i got the error.

Hi experts, As i follow the tutorials https://developers.sap.com/tutorials/abap-env-create-comm-arrangement-api.html But only 3 apps show . How can i add the app?

Hi experts, When i try to connect my subaccount ，it shows me 'Trail violation-at most two active mappings permitted'. Could anyone tell me what the problem is and how to solve it? Thanks a lot！

HI experts, my sap version is 730. When i execute report with huge rows, sap page always runs slowly and no responding. Could you help me, thanks a lot!

My gui verion is 7.50, please help me to slove it ,thanks a lot!