Windows – Task Scheduler not able to execute .vbs scripts successfully

Apologies if this has a really obvious answer!

We have several daily tasks we run via a .vbs script on our server (through the Task Scheduler), and for months it has been fine, but recently we've hit a problem. The .vbs scripts stopped successfully executing (always timing out)… but could still be executed manually with no problems(!).

Not knowing any good reason why the Task Scheduler should start having problems, we thought we'd try a little "creative thinking", and run the .vbs another way: Via a .bat file executed by the Task Scheduler. Again we hit weird issues, but with a little more debugging information, this time around.

The .bat file run by Task Scheduler is nothing more than…

CScript "C:\location\script.vbs" > Log.txt

But after an attempt to run it, the Task Scheduler fails with the following error:

0x1: An incorrect function was called or an unknown function was called.

The Log.txt (as output from the .bat file above) says:

CScript Error: Initialization of the Windows Script Host failed. (Not enough storage is available to process this command. )

But get this: The .bat file executes perfectly (vbs script and all) if it's executed with a double click! There's only a problem when it's run by Task Scheduler. What the hell?

We're running Windows Server 2008 R2 (x64) and yes, the Task Sheduler's results are the same whether the user is logged in or not. Also, the user that can run the scripts successfully manually, is also the same user that runs the scripts in Task Scheduler.

Thanks for any help for this weird problem!