RFC SDK, connect with japanese username to a unicode SAP system

Question

Hello everybody,
I try to connect with a japanese username to a unicode SAP system. I use VC++ and make the call like this:
     BYTE utf8_byteArray[10] = {0xE3, 0x81, 0x8A, 0xE3, 0x81, 0x99, 0xE3, 0x81, 0x99, 0x00 };
     CString sJapUser(utf8_byteArray);
     sConnectParam.Format( cU("CLIENT=%s USER=%s PASSWD=%s LANG=%s SYSNR=%d ASHOST=%s PCS=2"),
                         "800",
                         sJapUser,
                         "password",
                         "EN",
                         1,
                         "9.22.104.145");
     hRfc = ::RfcOpenEx( (char*)(LPCTSTR)sConnectParam, &error_info);
I tried it with different codepages and PCS settings (1/2) too but i always get the error:
"Name or password is incorrect (repeat logon)"
When I connect to a non unicode japanese system in locale encoding it works.
Another thing i saw is that the utf8 string is truncated after 12 bytes (12 character/bytes is the limit of user name length). When I use a japanese username with 6 japanese symbols (18 bytes in utf8) I see the following in the RFC trace:
rfcOpenHooked
    destination             <unknown>
    mode                    3
    conopt 3 hostname       9.22.104.145
    conopt 3 sysnr          1
    conopt 3 use_l_bal      0
    conopt 3 use_sapgui     0
    client                  800
    user                    おすすめ (here the username misses 2 japanese characters)
    language                E
    trace                   0
L-GetCodePage (DEFAULT-CP) rc = 0: 1100
Here the username is correct:
>>> RfcOpenEx ...
Got following connect_param string:
   CLIENT=800 USER=おすすめダウ PASSWD=******* LANG=EN SYSNR=1 ASHOST=9.22.104.145 CODEPAGE=4110 PCS=2
Send RFCHEADER: 01/LIT/IEEE/SPACE/4110
Send UNICODE-RFCHEADER: cp:4110/ce:IGNORE/et:5/cs:1/rc:0x00000023
In the RFC trace the username is truncated (only 12 bytes(4 characters) instead of 18 bytes (6 characters))
000160 | 44657369 676E0130 0111000C E3818AE3 |Design.0........|
000170 | 8199E381 99E38281 01110117 000C905F |..............._|
000180 | E417BBAC 1DDD543E CE540117 01140003 |......T>.T......|
To connect with japanese usernames using the SAP-GUI works fine but the rfc traces show that the connection is established in another way.
Can anyone help me with this or is it just impossible to use japanese usernames for logon with RFC.
Thank you in advance.

Answer 1

Please note the header of this forum: "This forum is dedicated to all other development-related questions which are not directly addressed by other forums. This includes Business Objects SDKs, products, or technologies which do not fall under BusinessObjects Enterprise, BusinessObjects Edge, Crystal Reports Server, or Crystal Reports (for example Desktop Intelligence SDK, Universe Designer SDK, Portal Integration Kits, Java User Function Libraries, and other third party technologies or development languages). "
I do not think you are using any of the products described above. Please post to the correct forum.
Ludek