How to Fix error 756 Error – Rasdial error 756 only solved by rebooting
Error 756 Rasdial error solved by rebooting
📋 Table of Contents
Rasdial error 756 is a frustrating issue that affects Windows XP Professional SP2 computers, which are used as unmanned field measuring devices. These computers automatically initiate a VPN connection with a server over a UMTS connection through a batch file. The error occurs when the UMTS connection drops and then comes back, preventing the VPN connection from being re-established without rebooting the computer.
This issue is particularly frustrating because it requires the user to manually reboot the entire machine to resolve the problem. In this guide, we will explore the root causes of Rasdial error 756 and provide two primary fix methods to resolve the issue without requiring a full system reboot.
⚠️ Common Causes
- Rasdial error 756 is often caused by the 'connection is already being dialled' error message. This occurs when the computer attempts to establish a new connection while an existing one is still in progress. The root cause of this issue lies in the way Windows handles concurrent connections and the lack of synchronization between the UMTS and VPN connections.
- Another possible reason for Rasdial error 756 could be related to the UMTS connection dropping and then reconnecting. When the UMTS connection is re-established, it may not be properly synchronized with the VPN connection, leading to the 'connection is already being dialled' error message.
🛠️ Step-by-Step Verified Fixes
Resetting Network Connections
- Step 1: Open the Command Prompt as an administrator and run the following commands in sequence: `route -f`, `ipconfig /release`, `ipconfig /renew`, `arp -d *`, `nbtstat -R`, and `nbtstat -RR`. These commands will reset various network connections and settings to their default values.
- Step 2: After running the above commands, try re-establishing the VPN connection using the batch file. If the error persists, proceed to the next step.
- Step 3: If the issue is resolved at this point, it indicates that resetting network connections was successful in resolving the Rasdial error 756.
Modifying the Batch File
- Step 1: Open the batch file used to initiate the VPN connection and modify the line `rasdial VPNserver stationname password` to include a delay between establishing the UMTS and VPN connections. This can be achieved by adding a `timeout /t 10` command before the `rasdial` command, like so: `timeout /t 10 && rasdial VPNserver stationname password`. This will introduce a 10-second delay between connection attempts.
- Step 2: After modifying the batch file, re-run the script and try to establish the VPN connection. If the error persists, it may indicate that another issue is at play.
💡 Conclusion
To summarize, Rasdial error 756 can be resolved by either resetting network connections or modifying the batch file used to initiate the VPN connection. By following these steps, users should be able to resolve the issue without requiring a full system reboot.
❓ Frequently Asked Questions
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