3607979 - RDDMASGL aborts during ACT_UPG phase of SUM

SUM stops ACT_UPG phase due to RDDMASGL job being aborted.

When checking the [SAPupConsole.log], you can see a situation similar with the following:

1AETR012XProgram canceled (job "RDDMASGL", number "XXXXXXXX")
1AEPU320 See job log"RDDMASGL""XXXXXXXX""YYY"

On transaction code [SM37], the job log informs to check the system log:

 Date       Time     Message text                                                          Message class Message no. Message type
 DD.MM.YYYY hh:mm:ss Job RDDMASGL XXXXXXXX started                                              00           516          S
 DD.MM.YYYY hh:mm:ss Step 001 started (program RDDMASGL, variant IMPACTMRG, user ID USER)       00           550          S
 DD.MM.YYYY hh:mm:ss Start of mass activation 12:34:09                                          AD           010          S
 DD.MM.YYYY hh:mm:ss Job canceled due to terminated process or program; see the system log      00           554          A

If you check transaction code [ST22], you will find a runtime error similar to the below:

Category               Communication error
Runtime Errors         CALL_FUNCTION_SEND_ERROR
Date and Time          DD.MM.YYYY hh:mm:ss

User and Transaction
    Client................. 000
    User.................. USER
    Language key.......... E
    Transaction.........
    ...
    Client................. 000
    User.................. USER
    Transaction.........
    Call program...........SAPLSDMP
    Function module..... DD_MASS_ACT_PARALLEL

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Software Update Manager, Activation, Distribution, MAIN_SHDRUN/ACT_UPG , KBA , BC-DWB-DIC-AC , ABAP Dictionary Activation and Conversion , Problem