That kind of an asset does not have all of the files that a ship or airplane would, so you can tell it to add it to the list of ignores just fine. All it does is add an entry to the SHVaidatorSH4.cfg file for the next time you run Validator. If you are concerned with all of the Ignores necessary to get through a run, you can always place "empty" text files in the folders with those names, and voilą, no more dialog pop-up - or just do the ignore...
If you happen to find that dialog pointing at a ship, plane or sub, do NOT ignore it... Just remember that Validator does not find all of the errors, since it only scans a portion of the files. It also will not save campaign errors to the log file it creates, so be sure and look at the program's read-out screen and copy off of it to supplement the log file. Also, it will not scan the German side of the game... it is a tool, not a toolbox...
