AP_TP_Name_Not_Recognized with DBCS and Single Signon

SYMPTOMS

When allocating a 5250 conversation using a double byte character set (DBCS) code page and the single signon feature, the following advanced program-to-program communications (APPC) return code may result: The partner LU does not recognize the TP name specified in the allocation request.

The following trace excerpt shows the TP name being 0x066F646E:

APPC   ---------------------------------------------- 17:43:27.20
APPC   MC_ALLOCATE request
APPC
APPC   Type:Sync                                  VerbID:00001400
APPC
APPC   ---- Verb Parameter Block at address 0210FB54 ----
APPC   01000100 00000000 00000000 00000000     <................>
APPC   B86A1A00 08801B00 00000000 00000000     <.j..............>
APPC   00000000 00000000 53313030 35444341     <........S1005DCA>
APPC   D8D7C3E2 E4D7D740 066F646E 40404040     <QPCSUPP@.odn@@@@> <-.odn
APPC   40404040 40404040 40404040 40404040     <@@@@@@@@@@@@@@@@>
APPC   40404040 40404040 40404040 40404040     <@@@@@@@@@@@@@@@@>
APPC   40404040 40404040 40404040 40404040     <@@@@@@@@@@@@@@@@>
APPC   40404040 40404040 02000000 00000000     <@@@@@@@@........>
APPC   00000000 E2C8E4C9 C3C8C940 4040E2C8     <....SHUICHI@@@SH>
APPC   E4C9C3C8 C9404040 00000000 00000000     <UICHI@@@........>
APPC   00000000 00000000 00000000 00000000     <................>
APPC   00000000 00000000 00000000              <............    >
				

The following is the return from the remote system after the allocate was sent to the AS/400:

APPC   ---------------------------------------------- 17:43:40.25
APPC   MC_RECEIVE_AND_WAIT response, result = ALLOCATION_ERROR
APPC
APPC   Type:Sync                                  VerbID:00004400
APPC
APPC   ---- Verb Parameter Block at address 0210FBE0 ----
APPC   0B000100 00030000 10086021 00000000     <..........`!....>
APPC   00000000 28FC1002 00000000 00000000     <....(...........>