SAP 4.6c LSMW issues with UTF-8 files uploads

Hi,

I am using SAP 4.6c and SAP GUI 7.2. Currently I have a requirement to upload the material master data into SAP system using LSMW.

I faced an issue when the material description is in Chines the input file is UTF-8 format. After I read data, I display the read data I see that the value for material description is not correct.

I tried to load the same file in SAP ECC6 system, it works perfectly. Therefore, I am searching for sap notes to fix the issues but still don't find any note yet.

So I really need your help to point out what's exactly the issue is and any suggestion to fix this issues.

Thank you so much in advance.

Hung