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

## SYSLOG Details
- **Message**: evSelectFD() failed: <variable>error-message</variable>
- **Help**: fud could not set a read function for a file descriptor in its event library context
- **Description**: UDP Forwarding process (fud) uses an event library to execute most of its tasks. fud could not set a read function for a file descriptor in its event library context.
- **Type**: SNO: Should Not Occur
- **Severity**: error
- **Cause**: -
- **Action**: Contact your technical support representative.
- **Attributes**: error-message
- **Facility**: LOG_DAEMON

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