I'm looking for help with a validation rule for controlling movement through opportunity stages, based on "key fields" (setup for path) being checked or not. Essentially I just need to check are boxes a &b &c all checked, if yes, allow saving into this opp stage; if not, of course throw an error. Here's what I have so far, and there has to be one simple thing I'm not getting. I'm getting it to throw the error, but when I check the field I also have it looking at, I'm still getting the error
ISPICKVAL( StageName ,"Proposal / Contract")&&All_Parties_Present__c = FALSE
I'll need to expand it to include two or three of those custom fields, like 'all parties present', but I figure once I get it working by validating one, it'll be easy to expand from there.