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

## SYSLOG Details
- **Message**: Unable to lock PID file: <variable>error-message</variable>
- **Help**: ipfd could not lock PID file
- **Description**: IPFD tried to lock the file that records its process ID, which is to prevent multiple instances of the process from running simultaneously. It failed to lock file and exited with this message.
- **Type**: SNO: Should Not Occur
- **Severity**: error
- **Cause**: -
- **Action**: -
- **Attributes**: error-message
- **Facility**: LOG_DAEMON

## Found this message in the following releases:
- [Junos OS 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=IPFD_PID_FILE_LOCK&sw=Junos%20OS&rel=24.2R1)
- [Junos OS 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=IPFD_PID_FILE_LOCK&sw=Junos%20OS&rel=23.4R1)