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

## SYSLOG Details
- **Message**: Unable to lock PID file; another <variable>program-name</variable> is running
- **Help**: pppd could not lock PID file
- **Description**: The Point-to-Point Protocol process (pppd) attempted to lock the file that records its process ID (PID), which serves to prevent multiple instances of the pppd process from running simultaneously. The attempt failed.
- **Type**: SNO: Should Not Occur
- **Severity**: error
- **Cause**: -
- **Action**: Check whether another pppd process is running, and stop it if appropriate.
- **Attributes**: program-name
- **Facility**: LOG_AUTH

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