Format of APPC/PC "Send_Error" control block:
Offset	Size	Description	)
 00h 12 BYTEs	reserved
 0Ch	WORD	1000h (verb "Send_Error" or "MC_Send_Error")
 0Eh	BYTE	1 if MC_ (mapped conversation) form of verb
		0 if basic verb
 0Fh  5 BYTEs	reserved (0)
 14h	WORD	(big-endian) primary return code (see #03681)
 16h	DWORD	(big-endian) error code (see #03682)
 1Ah  8 BYTEs	(big-endian) TP_ID
 22h	DWORD	(big-endian) conversation ID
 26h	BYTE	request to send received (0=no, 1=yes)
 27h	BYTE	type (0=program, 1=SVC)
 28h	DWORD	00h
 2Ch	WORD	(MC_Send_Error only) LOG_DATA length
 2Eh	DWORD	(MC_Send_Error only) pointer to LOG_DATA