I am attempting to run Minecraft 1.7.2, and Forge 10.12.2.1121. I have also tried with Forge 10.12.2.1147. The launcher will download what it has to, close, then nothing will happen. When I observe the Java processes in the task manager, I will see a second Java process appear (normal for me), begin to increase in memory use, then both will disappear. I've browsed the forum, and attempted a look-through of the EAQ, and have found nothing related to my problem (If something was there, and I missed it, then my apologies). I am not running any mods, just trying to make Forge actually work. This has been occurring since I updated my Minecraft launcher to the newest version.
My FML is here: http://pastebin.com/QJFSMS9p
Hoping I did this right. Any help would be appreciated.