This article has been archived. It is offered "as is" and will no longer be updated.
When you type schtasks at a command prompt to try to view scheduled tasks on your computer, you may receive the following error message:
ERROR: The task object version is either unsupported or invalid.
Note You do not receive this error message when you type at at a command prompt to view scheduled tasks.
This problem may occur when the Tasks folder contains a corrupted task. The default location of this folder is C:\Windows\Tasks.
Service pack information
To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389 How to obtain the latest Windows XP service pack
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Windows XP Home Edition and Windows XP Professional
Date Time Version Size File name ---------------------------------------------------------------- 27-Jan-2004 16:51 5.1.2600.1336 114,176 Sctasks.exe
Windows XP 64-Bit Edition
Date Time Version Size File name Platform ---------------------------------------------------------------- 27-Jan-2004 16:49 5.1.2600.1336 298,496 Sctasks.exe IA-64 27-Jan-2004 16:51 5.1.2600.1336 114,176 Wsctasks.exe x86
To work around this problem, remove the corrupted task from the Tasks folder. To remove the corrupted task, follow these steps:
Create a temporary folder on your desktop.
Move one task from the Tasks folder to the temporary folder.
Use the Schtasks command to see if the issue is resolved.
Repeat steps 2 and 3 until you do not receive the error message that is described in the "Symptoms" section of this article.
When you have identified the corrupted task, move the other tasks from the temporary folder to the Tasks folder.
Note When you no longer receive the error message in step 4, the corrupted task is the task that you most recently moved to the temporary folder.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Microsoft Windows XP Service Pack 2.
For additional information about the terminology that is used in this article, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates