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

## SYSLOG Details
- **Message**: Error opening filter file <variable>file-name</variable>
- **Help**: could not create forwarding-class mapping file
- **Description**: dfwd could not create the forwarding-class name to UP index mapping file
- **Type**: SNO: Should Not Occur
- **Severity**: error
- **Cause**: -
- **Action**: Contact your technical support representative.
- **Attributes**: file-name
- **Facility**: LOG_DAEMON

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