A standard class CL_HRPAYNA_GUI_ALV_TREE might be unavailable in your system. In this instance you should create it manually, with name ZXLWB_ALV_TREE, for example.

Here is nugget to install objects via SAPLINK .

Create a class

Call transaction SE24 and specify name of creating class ZXLWB_ALV_TREE and press the button «Create»:

Create a GET_OUTTAB method

Go to the «Methods» tab and add a new method GET_OUTTAB (Instance method, Public) :

Replace all matches of the CL_HRPAYNA_GUI_ALV_TREE with the ZXLWB_ALV_TREE in a ZXLWB_INCLUDE code.