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FAQ #26308, published on 2025-09-30, updated on 2025-12-04
HONOLULU
In which case does the launch of WINDEV subscription version fail with response 63?
The connection to WINDEV may fail with the following message:

Error 63 - Internal error.
Error returned by the key server: 63

This error may appear in exceptional cases if the reading, installation, or update of the local license has failed.
This local license allows you to use the editor without a connection.

Most often, this is due to a service that has not started correctly: 
  • open the Windows Services Manager,
  • search for the service named “Sentinel LDK License Manager,”
  • restart the service. If the service is missing or does not start, apply FAQ 3519 to reinstall the driver that manages the service.
  • Restart the WINDEV subscription version.
If the error persists even though the service has started correctly, there are two possible scenarios depending on whether you are using WINDEV Suite in a TSE session, with several developers who can use WINDEV Suite on the same machine at the same time, or not.

Use in a TSE session
WINDEV Suite normally detects automatically when it is running in a TSE environment. If this is not the case, you need to force WINDEV Suite to switch to TSE mode.
To do this, create an AboConfig.ini file in the same directory as WinDev64A.exe and wx64.exe, i.e. in the WINDEV Suite Programs folder.

This file must contain:
[CONFIG] 
ModeTSE=1; TSE Server mode force

Once this file has been created, if you are using version 2025 or earlier, you must add the command line parameter /ABOCONFIG (in uppercase) to launch WINDEV Suite.

You can create a shortcut that includes this parameter so that you don't have to enter it each time.

When WINDEV Suite launches, a toast will appear at the bottom of the screen with “TSE Mode = True” to confirm that this setting has been applied.

Important: all developers working on the same TSE server must apply this configuration.
If even one developer does not do so, the error will persist for everyone.

Finally, if a backup key has been installed in the TSE environment, it must be uninstalled.

Use on a dedicated workstation

Simply use a temporary backup key: 
  • launch WINDEV,
  • enter the email address of the PC SOFT account,
  • use “Backup Access” in the context menu of the connection options (gear icon at the bottom right),
  • follow the procedure detailed on the website https://emergency-access.windev.com/SiteSecours  


No further action is required. When this emergency key expires, the launch will occur automatically using the standard authentication mechanism.

If you continue to experience difficulties despite installing a backup key, please contact our support team using the online form, attaching a PDF created from this page on the computer that does not recognize the license: 
See also : Version, Subscription, server, key, 63