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

## SYSLOG Details
- **Message**: <variable>argument</variable> callback not set
- **Help**: Callback handler was not set
- **Description**: Message from pfe was not sent to the client as the given callback handler was not set
- **Type**: Internal: Internal log message
- **Severity**: error
- **Cause**: -
- **Action**: Contact your technical support representative.
- **Attributes**: argument
- **Facility**: LOG_DAEMON

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