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Win 2000 Server Scheduler

Posted on 2003-10-27
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Last Modified: 2010-04-14
Win 2000 Server Scheduler

What happens if a reoccurring scheduled task begins and the previous task hadn’t completed?

I have a program that I run every 5 minutes (it sends updates on the database via XML to another server/HTTP). My question is what happens if I have more data then can be sent within 5 minutes. The program was written in VB6.

Does the schedule know the other program is running and not start a new copy of the program?

Or does it start running another version of the program (so two of the same programs are running at the same time).

Thanks - Tom
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Question by:tomhoran
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6 Comments
 
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Accepted Solution

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boxcar7 earned 50 total points
ID: 9630916
It will just create a new instance of the program.

I have an access database that does something similar.  What I have done is write a vbs script that looks for the Access lock file file.  If it doesn't find it, it runs the Access database macro.

I would think you could do something similar.  Have your VB6 program put in a registry tag or have it create a temporary file to indicate it's status.  If you don't want to change the source, have the schedule a vbs that takes care of the task management and launching your program as necessary.

I hope this helps...

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Author Comment

by:tomhoran
ID: 9631121
boxcar,

Thanks for the idea. I figured it out. I'm using App.PrevInstance. This si the code i used, so the program just exits if its currently executing

If App.PrevInstance Then
     Exit Sub
End If
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Author Comment

by:tomhoran
ID: 10044119
i'd like to split the point 50 for them and 50 for me since i figured out the answer myself.
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