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Event ID 1021 — Subsystem for UNIX-based Applications Availability

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Applies To: Windows Server 2008

Subsystem for UNIX-based Applications (SUA) Availability is a measure of SUA's readiness to support POSIX applications and scripts.

Event Details

Product: Windows Subsystem for UNIX-based Applications
ID: 1021
Source: Microsoft-Windows-SUA-Psxss
Version: 6.0
Symbolic Name: PSX_BAD_PORT
Message: Connection to port %1 failed; Subsystem for UNIX-based Applications terminated during startup.

Resolve

Restart the computer--Subsystem for UNIX-based Applications failed due to an uncorrectable problem

The text of the error message in Event Viewer should show the exact source of the failure. Try restarting the computer to clear the error and resume work in Subsystem for UNIX-based Applications.

To restart the computer:

  • Click Start, click the arrow next to the Lock button, and then click Restart.

Verify

Verify that the Subsystem for UNIX-based Applications (SUA) Psxss.exe utility is available by viewing Psxss.exe in the Windows Task Manager.

To verify that Psxss.exe is running:

  1. Open Windows Task Manager by pressing CTRL+ALT+DEL, and then clicking Task Manager.
  2. On the Processes tab, select the Show processes from all users check box.
  3. Verify that PSXSS.exe is running.

If PSXSS.exe is not running, Subsystem for UNIX-based Applications (SUA) is not available.

Subsystem for UNIX-based Applications Availability

Subsystem for UNIX-based Applications