[propbeanie]

You've re-created a "stock" game issue with your additions. The problem basically lies in the spawn rate, and the fact that the Jap_HarborTraffic.mis file runs for the duration of the game (as does the US_HarborTraffic.mis file). If you input a unit or RGG (Random Generated Group) to spawn at a given location, the game will "default" to settings of 10,000 groups, of 100 vessels each, every 24 hours at a 100% rate. If you figure the game has no leap years, and therefore 365 days a year, you've got a total of nearly 1500 groups generating by the end of the war. Just for one little RGG icon on the map. The game would overload and crash your computer by 1943 with just one of those. So, the devs of the game decided that they would change the spawn time to every 900 hours from the 24... That's still 40 groups from each RGG that's "docked" in the game, and the game can and does crash by mid 1943 if you go visit certain traffic-heavy areas. Also, if you use the "Player" function in the Mission Editor, you will find several of the "Docked" RGG ~not~ docked, but rather moving around the world in a line set to where they were pointed. Most of those are around Japan itself, and you really need to find those and be sure and set their speed to zero, and make sure the "Docked Ship" is checked, and the "Delete on last waypoint" is unchecked. You need to adjust the amount of Groups and Units that the game spawns, and set the Dates to more "refined" settings.