Sap Regression Testing And Client Copy Logs Questions

Q1. remote client copy from Production to development server successfully But why for 
existing Material document we are not able to view accounting document
and how can done it.
ans-
Check the client copy logs and see if there were any errors if any error occur then resolve it and then try again.
Q-:2 In setting the first Sap-Screen visible to user
after logging in his ID.Like if i want user to use TCODE- SE38 after logging
IN,how can i change it. 
Ans-:
Login by user ID. press Shift+F7. mention the TCODE. it will be his
default default TCode like SE38.
 Q3-:

Actual regression testing scenarios for kernel upgrade. 

Ans-:

Ecc6.0 system which has SAP HR and our customized developments for our HR application. 

We are applying a Snote and the prerequsite for the applying the snote is a kernel upgrade. As I know we can only do testing or checks for a kernel upgrade. I am not aware of any regression testing steps for a kernel upgrade. Please let me know if we have regression testing scenarios for the same.

The regression testing is the responsibility of the Application team. In the past there have been some issues with Application Transaction codes after a kernel upgrade.
Remember to make a copy of the current kernel before changing the kernel.