I am working with a couple different objects:  Accounts<Locations<Serial Number<Service Call and made a process whereby a check box titled "PM" is available in the Service Call.  If the PM box is checked then it will look at the Date of Visit and use that date and input it into Date of Last PM under the Serial number, one object up.  It works for some but doesn't work for others.  I am trying to find out why.

Thank you!