SYS3176 when starting a Win-OS/2 session

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Fixing SYS3176 when starting a Win-OS/2 session requires a patch from IBM dated 1994.

Reproduction steps

  1. Install Windows for Workgroups 3.11
  2. Install OS/2 2.1 Special Edition for Windows
  3. Attempt to start a Win-OS/2 session in any way

Seen output

A SYS3176 error dialog. It can be dismissed and does not crash the rest of the system.

Fix

Download the following and run the installer: https://www.os2site.com/sw/upgrades/winos2/os2_win311.zip

You don't even need to reboot the system afterwards. Do note that the installer will immediately begin replacing system files without even an "are you ready?" first.

Notes

  • The website hosting the patch labels it as being for 2.11, but it works for 2.1.
  • The readme for the patch states Windows 3.11 is affected and fixed too.
  • The readme for the patch states networking inside the Win-OS/2 session is not supported.

See also