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kaiji shenkaiji shen 

Validation error not showing up

I have created a custom button set will set the opportunity to closed won.
In the mean time, I have a validation rule which will not allow the opportunity to "closed/won" if the amount is less then $1,000.

Now I have one opportunity has $100, and I click the button to make it "Closed/won". The result is that the oppornutiny stays as "New" but I did not see the error for this validation rule.

How can I still see the error message for the validation rule?
kevin lamkevin lam
Can you show us how was your validation rule set up?