Refresh_protocoll - CL_ALV_CHANGED_DATA_PROTOCOL - nothing happens - why??

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Hallo together,

I am realising a transaction with editable alv-grid-control. I use the event handler to react on user handling and implemented a method handle_data_changed where i referred to cl_alv_changed_data_protocol. In this method i handle the data changed and i am using the protocol. So far everything goes well.

Now i have a problem, because i want to refresh the protocol but i don´t know how. Because when i use the method refresh_protocol nothing happens, because m_log_handle is initial.

I found in "An Easy Reference for ALV Grid Control" documentation in "a piece of troubelshooting" under no. 12 this problem, but with the answer i can´t do anything.

Could somebody give me a hint?

Thanx´s a lot and greetings from cologne - germany.

Timo