I'm trying to set up an Opportunity validation rule, whereby if "Closed Lost" is selected from the Stage picklist, a specified custom field (Reason) must be completed. 

I set up the formula as follows:

AND (

ISPICKVAL(StageName,"Closed Lost"),

ISNULL(Reason__c))

No errors are found, but I do not get an error message when selecting this criteria.

Also, can validation rules be specific to certain record types only?

Thanks for your help!

I'm trying to set up an Opportunity validation rule, whereby if "Closed Lost" is selected from the Stage picklist, a specified custom field (Reason) must be completed. 

I set up the formula as follows:

AND (

ISPICKVAL(StageName,"Closed Lost"),

ISNULL(Reason__c))

No errors are found, but I do not get an error message when selecting this criteria.

Also, can validation rules be specific to certain record types only?

Thanks for your help!