Hi,
Basis the screenshot shared for Model > root definition, i can confirm that you must extend the Model Mapping "Payment model mapping 1611" or if you have already extended this model mapping for other purposes, you can utilize the same. Initially you have shared the Format mapping which i explained in my previous reply..
So, try with this model mapping and let us know if you are still facing any issues..
Have you already extended your "Payment model", if yes then new model mapping must refer to the extended payment model and similarly while extending the ISO20022 Credit transfer MEX, you should use the extended payment model..
Answer to your second question:
If you want to extend the existing ISO20022 Credit transfer HSBC MEX, then it will be created as subnode only. If you select the ISO20022 Credit transfer, then only it will create parallel to ISO20022 Credit Transfer (ZA) IND.
Is there any specific reason to create parallelly or subnode is creating any issues?
And if it is must to create parallelly, then there is a way to do it, export the xml file in text editor, update the GUID and name of ER format and then import again, it will create a parallel but copy of ISO20022 Credit transfer HSBC MEX. I don't recommend this approach unless you are very sure about your changes.. i have done this for GSTR report while i need the exact copy of Microsoft versions without extending them.
If this helped, please mark it as "Verified" for others facing the same issue Keep in mind that it is possible to mark more than one answer as verified
Regards,
Neeraj Kumar