im getting a few warnings in the log file when generating gerbers.
WARNING: more than one via class in film record
WARNING: Null REGULAR-PAD specified for padstack VIA188 at (-576.17 -530.00)
is it ok to leave these warnings alone?
Probably not. The Via Class entry for a given layer Film Control would be VIA CLASS/<layer>, like VIA CLASS/TOP, this might not matter of all the Vias are through but probably best to look at the Film Control data and clean this up.
Connections are made to the Regular Pad(s), NULL means a zero, or no, definition for that padstack so its not going to be making a connection. Visit the location in PCB Editor and check padstack definition, Tools>Padstack>Modify Design Padstack, select the location and Edit in Options to open the padstack definition. (Or Tools>(Quick )Reports and get a Padstack Definition report on all the padstacks) Could be that VIA188 is not defined correctly.