Error Code 0x8000703B Summary
The error code 0x8000703B, also known as RPC_E_UNMARSHALLING_FAILED, typically indicates an issue with Remote Procedure Call (RPC) in Windows operating systems. This error can occur when there is a problem unmarshalling data from the network into native format for processing within the system. Unmarshalling is the process of converting data back to its original form after it has been sent over a network connection, and this operation fails due to issues such as incorrect data format, missing or corrupted data packets, or problems with the client-server communication.
This error can manifest in various scenarios involving software applications that rely on remote procedure calls for functionality, including but not limited to:
• Network services and protocols.
• Applications using Windows Management Instrumentation (WMI) queries.
• Distributed Component Object Model (DCOM) configurations or interactions.
• Software updates and installation processes through Microsoft Update or similar services.
To resolve the error 0x8000703B, follow these detailed steps:
- Ensure that all installed software is up-to-date, particularly components like Windows Update, WMI providers, and DCOM configuration tools. This can often rectify compatibility issues contributing to RPC errors.
- Check network connectivity and ensure there are no firewalls or security settings blocking necessary ports for RPC communication. Specific port requirements vary but commonly include TCP 135 for base RPC services and dynamic ports assigned by Windows.
- Run System File Checker (SFC) to scan and repair corrupted system files which might be causing the unmarshalling issue: open Command Prompt as Administrator, type
sfc /scannow
, and wait for completion. This command checks all protected system files and replaces incorrect versions with correct Microsoft editions. - Execute a Distributed Transaction Coordinator (DTC) reset if working with applications involving DCOM or similar technologies that utilize transactions across multiple systems: open Component Services from Administrative Tools, navigate to Computers > My Computer > Distributed Transaction Coordinator > Local DTC, right-click on Local DTC and select Properties. Go to the Security tab, click Reset to configure new security settings.
- Reinstall problematic software components or applications generating this error. Uninstallation followed by a reboot might be necessary before proceeding with reinstallation to ensure removal of all associated files and registry entries.
Description of Error Code 0x8000703B and Where It Could Appear
The occurrence of 0x8000703B can vary widely depending on the specific environment and circumstances:
• During software installation or updates, especially those involving remote servers for download or validation.
• When attempting to access network resources managed by WMI queries or scripts that rely on WMI data.
• Within enterprise settings where DCOM applications are utilized heavily for cross-system communication or task automation. In these cases, the error may indicate misconfigurations within the COM+ Applications service or related permissions issues between users and roles.
This error can also surface in more general network operations such as remote desktop connections or any scenario requiring RPC-based authentication mechanisms across networks. It is crucial to diagnose whether local system files are intact and if there’s adequate permission granted for specific user accounts engaging in these activities, especially within a domain environment where security policies might influence availability of certain RPC services.
Additionally, consider reviewing event logs from both client and server sides involved in the communication leading up to this error. These logs often provide more granular details about what led to the unmarshalling failure and can offer clues on whether it’s a network issue preventing data from reaching its destination or an internal problem with the receiving system failing to correctly interpret incoming RPC calls.
Lastly, since many of today’s applications leverage cloud services that also rely on robust inter-system communication protocols like those facilitated by RPC, encountering this error during routine operations within such environments might suggest a need for checking subscription status and service availability from providers. In cloud contexts, troubleshooting often extends beyond local system configurations to include verifying connectivity settings across multiple geographic regions or data centers involved in the network topology.
Howto solve error code 0x8000703B
- Restart your computer to clear any temporary issues with RPC-related services that might be causing the error.
- Analyze event logs (Event Viewer) for entries related to this error around the time of occurrence. This can provide context clues about which processes or components were involved and if there are associated warnings suggesting immediate actions to address before proceeding further.
- Run Windows System Restore to revert system settings to a previous state when everything was functioning correctly, but ensure no critical updates or configurations since that point have been made without proper backups. This approach is helpful if recent changes introduced instability leading to the RPC error.
- If working in an enterprise network with strict security policies, contact your IT department for advice on necessary permissions adjustments or policy waivers specifically required by applications generating this error. Misconfiguration of domain accounts used for DCOM services can cause such issues across networks.
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