⚠️ 2 verified solutions available for Error 1779 — Last updated 2026-04-06
Error 1779 📋

Fix RPC_X_SS_CANNOT_GET_CALL_HANDLE — Windows Error Code 1779

Error 1779 (RPC_X_SS_CANNOT_GET_CALL_HANDLE) is a Windows RPC & Network error that occurs when the stub is unable to get the remote procedure call handle.. This guide provides step-by-step solutions to resolve this issue.

🏷️ Code: 1779 📛 RPC_X_SS_CANNOT_GET_CALL_HANDLE 📅 Updated: 2026-04-06 ⏱️ 2 Solutions
⚡ Quick Fix

Restart RPC Services: Press Win+R, type services.msc, press Enter

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🐞 Auto-Fix Script for Error 1779
⚠️ How to use: Open PowerShell as Administrator, paste the code above, and press Enter.
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📑 Table of Contents
What is Error 1779? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 1779?

Windows System Error Code 1779, known as RPC_X_SS_CANNOT_GET_CALL_HANDLE, is a RPC & Network error that occurs during Remote Procedure Call (RPC) and network communication. The error indicates that: The stub is unable to get the remote procedure call handle. When this error is encountered, the Windows operating system was unable to complete the requested operation within the network services subsystem. The error code 1779 is returned by the GetLastError() function and provides developers with a specific identifier to diagnose the root cause of the failure. The symbolic name RPC_X_SS_CANNOT_GET_CALL_HANDLE maps directly to this numeric code and is commonly referenced in Microsoft documentation, developer forums, and system logs. Understanding this error and its context within Remote Procedure Call (RPC) and network communication is essential for effective troubleshooting.

⚠️ Common Causes

  • RPC service or its dependencies (DCOM, Endpoint Mapper) are stopped
  • Firewall is blocking RPC ports (135 and dynamic range 49152-65535)
  • Network connectivity issues between client and server
  • Active Directory or DNS issues preventing server discovery
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✅ Step-by-Step Solutions

1 Restart RPC Services
  1. Press Win+R, type services.msc, press Enter
  2. Find 'Remote Procedure Call (RPC)' — ensure it's Running and set to Automatic
  3. Also check 'RPC Endpoint Mapper' and 'DCOM Server Process Launcher'
  4. If stopped, right-click each → Start
  5. If they won't start, run: sc config RpcSs start=auto from Admin CMD
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2 Check Firewall Rules for RPC
  1. Open Windows Defender Firewall with Advanced Security (wf.msc)
  2. Check Inbound Rules for 'Remote Procedure Call' entries
  3. Ensure they are Enabled (green checkmark)
  4. RPC uses dynamic ports 49152-65535 — ensure these aren't blocked
  5. Temporarily disable third-party firewalls to test

🎬 Video Tutorials

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How to fix Error 1779 (Rpc X Ss Cannot Get Call Handle)
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💻 Diagnostic Command

Run this PowerShell command to find related events in your system log:

Get-EventLog -LogName System -Newest 20 | Where-Object {$_.Message -like "*1779*" -or $_.Message -like "*RPC_X_SS_CANNOT_GET_CALL_HANDLE*"} | Format-List

💡 Open PowerShell as Administrator, paste the command above, and press Enter.

🛡️ Prevention Tips

  • Never disable the RPC service — many Windows features depend on it
  • Monitor service health using: sc query RpcSs periodically
  • Ensure DNS is properly configured for domain-joined computers
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Last updated: 2026-04-06
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Based on Official Microsoft Documentation
Solutions Tested on Windows 10 & 11
Error codes sourced from Microsoft Win32 SDK. Updated 2026-04-06.
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