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Halting a script if it has already been run

Question asked by njoyce on Jun 9, 2009
Latest reply on Jun 9, 2009 by philmodjunk

Title

Halting a script if it has already been run

Post

How do I stop a script if it has already been run?  I have several tables with different pieces of information that all relate back to one study (e.g. changes made, people added, etc.) and I have a running list of everything that happens to each study in another table called "history". But if by accident I click the button twice to run the script that creates an entry into the history table indicating that something has been done to this study, I get duplicate records. I want the script to halt if it has already been run.

 

thanks so much for all your help.

 

 

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