I wasted a good couple of hours trying to figure out why my application engine programs would no longer run in Application Designer (two-tier). I have concluded that it is due to a PeopleTools bug in Application Designer. Something was causing the App Engine program to run in an infinite loop. I had to manually close the psae.exe process, and observed that the log file couldn’t even execute the first step of MAIN:

PeopleTools 8.51.03 - Application Engine
Copyright (c) 1988-2011 Oracle and/or its affiliates.
All Rights Reserved

2011-04-05-14.48.24.218016  SearchArchive [1155] Exception logged: RC=3.
2011-04-05-14.48.24.218016  AeCursCheckOutCallState [1119] Exception logged: RC=3.
2011-04-05-14.48.24.218016  GetNextStateRecord [68] Exception logged: RC=3.
2011-04-05-14.48.24.218016  GetNextStateRecord [68] Exception logged: RC=3.
2011-04-05-14.48.24.218032  GetNextStateRecord [68] Exception logged: RC=3.
14.48.25 Tracing Application Engine program JAY_AE Jays Test AE (C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\PS\PS\AE_0405144824_2188.AET)
Application Engine Debugger - enter command or type ? for help.

JAY_AE.MAIN.Step01>
Invalid command - please try again or type ? for help

JAY_AE.MAIN.Step01>
Invalid command - please try again or type ? for help

JAY_AE.MAIN.Step01>
Invalid command - please try again or type ? for help

JAY_AE.MAIN.Step01>
Invalid command - please try again or type ? for help

This was really frustrating as it was working all along before. The only way I could get it working again was to deselect the “Debug” checkbox in Configuration Manager. You can do this by performing the following steps:
1. Open Configuration Manager
2. Navigate to the “Profile” tab
3. Click the “Edit” button for the Profile
4. Click on the “Process Scheduler” tab
5. Deselect the “Debug” checkbox on the Application Engine frame

Deselect the "Debug" checkbox on the "Process Scheduler" tab

This is my current workaround, but it means that I’m unable to debug non-PeopleCode Application Engine steps (unless I run psae.exe manually…but then I can’t debug PeopleCode steps!). If anyone knows how to fix this problem, then I’d be grateful if you could let me know :S.

I like to enable Guest access at work so that I can easily share directories without having to worry about user security. Unfortunately in Windows 7 after enabling Guest access, I can now see the Guest account on the initial logon screen. Fortunately, you can remove this by performing the following:

1. In the run dialog (Windows + r), type “control userpasswords2” and then press enter.
2. Select the “Guest” user and press “Properties”
3. Select the “Group Membership” tab
3. Click on “Other” radio button (even though it may appear greyed out)
4. Change the dropdown for the Other radio button to “IIS_IUSERS”.

The Guest user should now be hidden from the welcome screen when you next logon.