Dear all ,
One of your sapuser got the issue in SAP .
kindly check the below ST22 logs.
SAPGUI sends unexpected data
Invalid data was received in the RFC handling within the kernel.
An error occurred on the client on which the SAPGUI is being executed.
As a result, data was sent to the R3 server via RFC even though the
server is not expecting any.
How to correct the error
Check whether the environment variable RFC_GUI_FIX_CP=1 is set on your
front-end system. If it is and the error occurs frequently, you can
temporarily solve the problem by setting this variable to 0.
>>>However, do not change this variable if it was set explicitly and its
functions are required<<<
Search for further information in the note system.
You will fine SAPLOGON or SAPLOGON PAD things shortcuts on the sap user's desktop screen.
Open it, then [Press ALT+SPACE|http://www.tr.txstate.edu/software/download/sapgui-windows/contentParagraph/0/content_files/file10/SAPGUI-Windows-2.jpg], and then select "[About SAP Logon|http://adalsc.com/sapgui_info.jpg]".
The dialog box that now appears displays the SAP GUI patch level including other version information. Please refer [SAP Note 491100 - Determining the SAP Gui patch level|https://service.sap.com/sap/support/notes/491100].
Please refer these screen shots [screen-1|http://www.tr.txstate.edu/software/download/sapgui-windows/contentParagraph/0/content_files/file10/SAPGUI-Windows-2.jpg] and [screen-2|http://adalsc.com/sapgui_info.jpg] for the same. Take them as reference images.
Bhavik G. Shroff