InfoPath Dev

Sorry for the delay in my response,  things have been a bit hecktic.  I could attach the form,  but the I can't even get the rule i need added since i get the error when setting the rule. I have tried both the DisplayName and AccountId but when setting the rule up i get an error that tells me "Enter a ...

Something i see i neglected to say before is that error i get when trying to set a value to the people picker is that it needs to be an integer

that did it! thanks!  but account ID doesn't give me a number.  gives me a domain\user.name  

Thank you for the reply.  I will attempt to muddle through,  using the information given.  I can not open the sample you provided my sys admin has that ability blocked.

I have found several posts about auto populating fields based on other fields.  But none address populating a "person or Group" field. I need to auto populate a responsible individual for action based on the category selected on the form.  But when i try to set up the rule it won't allow me to set the person or group field ...