How To Fix Win32 Error Code 1727

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    Hopefully, if you have Win32 error code 1727 on your system, this guide should help you. Causes. The RPC error, which can be reported in error 1727, can occur because bad packets, port blocking, and firewall rules are blocking a reliable good port if the firewall or its network router is not configured correctly. The RPC error can also occur when Windows Server 2003 Service Pack 1 adds a new RPC item.

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    In This Article

    This article fixes some “Remote call procedure not completed and not completed” errors. This error occurs during replication of a game domain controller (DC) to Windows Server. For:

    win32 error code 1727

    applies to Windows 10, version 2004, Windows 10, version 1909, Windows Server 2019, Windows Server 2012 R2, Windows Server 2016
    Original Knowledge Base Number: 4019721


    This Active Directory (AD) replication error occurs in one or more of the following forms:

    • Decimal: 1727
    • Hexadecimal: 0x6bf
    • Symbolic: RPC_S_CALL_FAILED_DNE
    • Error message: A separate procedure call failed and was not simply completed.


    • Network connectivity issue between multiple domain controllers (DCs). You can usually find more information in the following sections.
    • A global partner replication problem caused by stress. This problem is less common and can often be described as temporary. See the following sections for more information.

    About A Problem Connecting To The Network System

    When this issue occurs, the replication partner of these domain controllers cannot establish my RPC connection to the AD Replication RPC service (DRSR UUID E3514235-4B06-11D1-AB04-00C04FC2DCD2). In particular, although the replication partner can bind to the RPC endpoint mapper, it cannot simply complete the DRSR-RPC bind.

    • Firewall
    • Router
    • WAN Optimizer
    • other more advanced networking devices.
    • Power Filter Driver

    About The Actual Performance Issue

    When this problem occurs, usually only one of the following conditions is true:

    • Server is lagging behind and does not obey TCP-ACK protocol or responseAny type of feeling. The sender of the e-mail is canceling the TCP session.
    • The network is too slow or unreliable. It cannot forward TCP or acknowledge the type of reply message.


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    To resolve this issue, identify some of the recent changes affecting the network between the two domain controllers and revert the changes if possible. If there have been no recent changes, someone should fully test the connectivity of the RPC channel between the two domain controllers. To do this, follow general human troubleshooting instructions or detailed troubleshooting instructions.

    First Steps To Troubleshooting

    1. Take a two-sided photo of a social network reproducing an obstacle. To do this, follow a few steps:

      1. Start the network after taking over the two domain controllers.
      2. Start manually between replicating two domain controllers.
      3. Stop both sides of the trace when you receive an error message.
    2. Explore RPC Dialogue Between Two Contradomain ollers. Determine if there is a case where the replication partner is not responding to a message sent through the requester’s domain controller.

    Detailed Troubleshooting Instructions

    Begin network recording on the two primary domain controllers before following the audience’s instructions for testing DC connectivity.

    Verify DC Source Connectivity To Target DC Current

    1. win32 error code 1727

      Ensure that the source domain controller is only connected to TCP port 135. To do this, run the command PortQry.exe -m -e 135 .

      If the port is renamed using the FILTER, AD error replication will most likely fail and error 1722 will return instead. Try to help you with error 1722 and see if AD replication is successful; If the problem persists, repeat the detailed troubleshooting steps.

      If the status is NOT FILTER, the statements return the RPC endpoint mapper directory. Find the MS NT Directory DRS interface. Find the top zone in the Endpoint Mapper database where isthe destination domain controller can listen for AD replication. You can create one or more entries. Take note of the ports again with ncacn_ip_tcp.

      For example, you will get something similar to the following example where ports 49159 and 49160 are listed at the top:

      UUID: e3514235-4b06-11d1-ab04-00c04fc2dcd2 DRS interface from MS NT directoryncacn_ip_tcp: 2012dc [49159]UUID: e3514235-4b06-11d1-ab04-00c04fc2dcd2 DRS interface from MS NT directoryncacn_ip_tcp: 2012dc [49160]


      The ports in the upper zone are DC dependent and remain dynamically assigned. However, an administrator might be able to hard-code the port included in AD for replication using the actual registry value listed below.

      HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Services NTDS Parameters
      Registry Value: TCP / IP Port
      Value type: REG_DWORD
      Value (available data: port)

    2. Verify the TCP port connectivity to the above locations. To do this, use the following command:

        PortQry.exe -n  -e  

      For example, you run commands like this:

        PortQry next.exe -n 2012dc -e 49159PortQry.exe -n 2012dc -e Port 49160 

      If for PRIORITY is set to FILTER, check the network warning you recorded to see which rrn is blocking the packet.

    3. Test DNS. Make sure the destination can identify the CNAME and HOST records that are most commonly associated with the source domain controller. And check where the IP was resolved as it is the real IP of the domain controller that is causing it. If DNS points to an old or invalid IP address after establishing an RPC connection to the wrong source domain controller.

    Check The Destination Of All DC Connections From The Original DC

    • Article
    • 3 minutes to read.

    Sometimes there is a partial response that contains a TCP control ACK for the request entity. But the traffic has been upgraded or the response doesn’t really appear on the requestor’s domain controller. Thus, most of the TCP stack does not receive an ACK.

    The top area is domain controller specific and is also dynamically assigned. However, the manager can hard-code the port that AD always uses.Uses for replication by selecting the following registry value.

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