# UI_YANG_LOCK_FAILED

## Canonical Reference

[UI_YANG_LOCK_FAILED](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED)

**Canonical URL:**  
https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED

## SYSLOG Details
- **Message**: Could not acquire exclusive lock on <variable>message</variable> while updating device YANG modules
- **Help**: Failed to lock file before generating the Yang modules
- **Description**: The generation of Yang models in a directory and reading of the models is synchronized with a file locking mechanism
- **Type**: Error: An error occurred
- **Severity**: error
- **Cause**: -
- **Action**: -
- **Attributes**: message
- **Facility**: ANY

## Found this message in the following releases:
- [Junos OS 26.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS&rel=26.2R1)
- [Junos OS 25.4R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS&rel=25.4R1)
- [Junos OS 25.2R2](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS&rel=25.2R2)
- [Junos OS 25.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS&rel=25.2R1)
- [Junos OS 24.4R2](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS&rel=24.4R2)
- [Junos OS 24.4R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS&rel=24.4R1)
- [Junos OS 24.2R2](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS&rel=24.2R2)
- [Junos OS 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS&rel=24.2R1)
- [Junos OS 23.4R2](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS&rel=23.4R2)
- [Junos OS 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS&rel=23.4R1)
- [Junos OS Evolved 26.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS%20Evolved&rel=26.2R1)
- [Junos OS Evolved 25.4R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS%20Evolved&rel=25.4R1)
- [Junos OS Evolved 25.2R2](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS%20Evolved&rel=25.2R2)
- [Junos OS Evolved 25.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS%20Evolved&rel=25.2R1)
- [Junos OS Evolved 24.4R2](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS%20Evolved&rel=24.4R2)
- [Junos OS Evolved 24.4R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS%20Evolved&rel=24.4R1)
- [Junos OS Evolved 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS%20Evolved&rel=24.2R1)
- [Junos OS Evolved 23.4R2](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS%20Evolved&rel=23.4R2)
- [Junos OS Evolved 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS%20Evolved&rel=23.4R1)
- [Junos OS Evolved 22.2R3](https://apps.juniper.net/syslog-explorer/?msg=UI_YANG_LOCK_FAILED&sw=Junos%20OS%20Evolved&rel=22.2R3)