I have created Idoc type HRMD_A with 0105 infotype (communication) sending from target to source system. Also I`ve set change pointers for this message type. In case of sending idoc with new username record everything works correct. But when i try to change existing field in IT0105 using tcode PA30, target system receives updated Idoc with status 51, message "You cannot update infotype 0105 on database table PA0105 (Check the entries in table T777D and restart inbound processing)". Updates of other infotypes work correct.
I`ve checked table T777D and have not find any problems. I`ve looked up and read all related topics is SAP Forum (for example, STATUS 51 ERROR in ale idoc), checked all suggesting steps, but it didn`t help to solve problem.
Please, help me.