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

## SYSLOG Details
- **Message**: popen failed: command: <variable>command</variable>; error <variable>error-message</variable>
- **Help**: The popen() system call failed
- **Description**: The CLI uses popen() system call to read the command output. This system call failed in an unexpected way
- **Type**: Error: An error occurred
- **Severity**: error
- **Cause**: -
- **Action**: -
- **Attributes**: command
error-message
- **Facility**: LOG_USER

## Found this message in the following releases:
- [Junos OS 26.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS&rel=26.2R1)
- [Junos OS 25.4R1](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS&rel=25.4R1)
- [Junos OS 25.2R2](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS&rel=25.2R2)
- [Junos OS 25.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS&rel=25.2R1)
- [Junos OS 24.4R2](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS&rel=24.4R2)
- [Junos OS 24.4R1](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS&rel=24.4R1)
- [Junos OS 24.2R2](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS&rel=24.2R2)
- [Junos OS 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS&rel=24.2R1)
- [Junos OS 23.4R2](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS&rel=23.4R2)
- [Junos OS 23.2R2](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS&rel=23.2R2)
- [Junos OS Evolved 26.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS%20Evolved&rel=26.2R1)
- [Junos OS Evolved 25.4R1](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS%20Evolved&rel=25.4R1)
- [Junos OS Evolved 25.2R2](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS%20Evolved&rel=25.2R2)
- [Junos OS Evolved 25.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS%20Evolved&rel=25.2R1)
- [Junos OS Evolved 24.4R2](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS%20Evolved&rel=24.4R2)
- [Junos OS Evolved 24.4R1](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS%20Evolved&rel=24.4R1)
- [Junos OS Evolved 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS%20Evolved&rel=24.2R1)
- [Junos OS Evolved 23.4R2](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS%20Evolved&rel=23.4R2)
- [Junos OS Evolved 22.2R3](https://apps.juniper.net/syslog-explorer/?msg=UI_CLI_POPEN_FAILED&sw=Junos%20OS%20Evolved&rel=22.2R3)