License Troubleshooting: License Key / Serial Number Not Working
This guide helps troubleshoot cases where you obtained an SDK package from Foxit Developer Hub or other official Foxit channels but licensing does not take effect.
Symptoms
Without modifying the SDK package, you configured the License Key and Serial Number, but the SDK still reports license failure or features remain locked.
Common Causes and Fixes
Official Foxit SDK packages are usually tested before release. If licensing fails, a common cause is an incorrect device system date:
- If the device date is earlier than StartDate in
rdk_key.txtunder the packagelibsdirectory,librdk.somay fail to unlock.
Resolution
- Check and correct the device system date and time zone so the time is not earlier than
StartDateinrdk_key.txt. - Restart the app and initialize the SDK again after correction.