Event ID 1002 — Subsystem for UNIX-based Applications Functionality

Event ID 1002 — Subsystem for UNIX-based Applications Functionality

Updated: December 16, 2008

Applies To: Windows Server 2008 R2

Subsystem for UNIX-based Applications (SUA) Functionality is a measure of how the SUA send-and-receive utility, Psxss.exe, is functioning. When Psxss.exe is operating normally, SUA is able to accept user commands, and port applications over to Windows-based operating systems from UNIX-based operating systems.

Event Details

Product: Windows Subsystem for UNIX-based Applications
ID: 1002
Source: Microsoft-Windows-SUA-Psxss
Version: 6.0
Symbolic Name: PSX_STATUS
Message: Subsystem for UNIX-based Applications status: %1

Read Event Viewer message text; restart the computer

Read the message associated with this error in Event Viewer. If, according to Event Viewer, this is only an informational message, you can ignore the message.

If the message is not merely informational, the message text in Event Viewer typically describes the root cause for this error. This error typically occurs in the following conditions:

  • An NT API has failed, typically a kernel-exposed API.
  • An unexpected ASSERT failure occurs for a critical system expected value (for example, a critical return value or handle is set to NULL).

Try restarting the computer to clear this error state.

To restart the computer:

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


Verify that the Subsystem for UNIX-based Applications (SUA) Psxss.exe utility is functioning, first by viewing Psxss.exe in the Windows Task Manager, and then by using an SUA application that you have developed or are porting to Windows to transmit data over the network.

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.

Next, use an application on which you are working in SUA, or that you are porting to Windows by using SUA, to send some data over the network. For example, attempt to use your application to modify files or documents in another location on the network. If PSXSS.exe is functioning properly, and is active in the list of processes in Task Manager, sending SUA application data over the network should succeed.

Related Management Information

Subsystem for UNIX-based Applications Functionality

Subsystem for UNIX-based Applications


Leave a Reply