anchor.diff:  
   Mandatory for *command_id*: *1*,*4*. For other commands, it is optional/empty field.
   
  -|0x1195|sysflags|LONG1..20|Mand|Any| Bitwise ORed flags of:
  +|0x1195|sysflags|LONG1..20|Mand|0|Any|Bitwise ORed flags of:
   
   *0x00000001* - internal system error. Used in *command_id* value *2* (tpreturn). If flag
   is set tag *0x11B3* is loaded with XATMI error code that shall be returned to the caller,
  
positive.code: .XATMI call
  |=========================================================
  |TLV TAG | Name | Format | Cond | Default value | Applicable command_id | Description
  |0x1055 |stdhdr        |STDHDR1..PMSGMAX |Mand| N/A| Contains *command_id*:
  
  *1* - tpcall/tpacall message.
  
  *2* - tpreturn message.
  
  *3* - tpforward message.
  
  *4* - tpconnect message.
  
  
negative.code: *0x00000002* - used by *command_id* *2*, to indicate that server has performed return from
  the conversation.
  
  *0x00000100* - marking that auto-transaction is started, and call receiver (*command_id* *1*)
  becomes auto-transaction owner.
  
  |=========================================================
  
  Fields for non applicable commands/messages shall be empty string or 0 integer.
  
  
  === TP Notify / TP Broadcast message block
  