I read different stories in articles about Arjuna death (Killed by Yama, Killed by Babruvahana during Ashwamedha Yagya and Arjuna finally died during his journey to Swargaloka)
According to Wiki sources: "It is also to be noted that the listener of the Mahabharata is Janamejaya, Parikshit's son. Except for Yudhishthira, all of the Pandavas grew weak and died before reaching heaven (only Yudhishthira is allowed to keep his mortal body). Arjuna was the fourth one to fall after Draupadi, Sahadeva and Nakula".
All stories apart, So My question was there are any Scripture describe exact reason or Curse behind Arjuna death? If Arjuna killed or weak why didn't Krishna help him for journey to Swargaloka (Heaven)?