Reconciling the hadeeth about al-Jassaasah and the hadeeth “Do you see this night of yours…”
Question

                I heard that amongst the signs of the last hour that the Anti-Christ is alive until he comes out, the hadeeth of Tameem Ad-Daari. Another hadeeth of the prophet, peace be upon him, says what means that all those who are alive at that day will die within 100 years. The evidence is that there was no sahabi alive at 110 A.H. My question is how to understand both ahadeeth together? Why did the anti-Christ not die? May Allah protect you and us from his fitnah!.
Praise be to Allah.The hadeeth of Tameem 
    al-Daari was narrated by Muslim in his Saheeh. It has been quoted in 
    full in the answer to question no. 82643. 
It indicates that the 
    Dajjaal is alive at present, and was alive at the time of the Prophet  
    (peace and blessings of Allaah be upon him), and that he will remain 
    detained until permission is given to him to emerge. This does not 
    contradict what is narrated in al-Saheehayn from ‘Abd-Allaah ibn 
    ‘Umar (may Allaah be pleased with him), who said: The Prophet  (peace 
    and blessings of Allaah be upon him) led us in ‘Isha’ prayer one night at 
    the end of his life, then when he had said the salaam he stood up and said: 
    “Have you seen this night of yours? One hundred years from now, there will 
    no one left who is on the face of the earth.” Narrated by al-Bukhaari (116) 
    and Muslim (2537). 
This hadeeth is general in 
    meaning and the hadeeth of Tameem is specific, therefore it is exempted from 
    the general meaning of the hadeeth of Ibn ‘Umar; or the Dajjaal at that time 
    was in the sea and not on land, so he was not included in the hadeeth of Ibn 
    ‘Umar. 
Al-‘Allaamah Muhammad 
    al-Ameen al-Shanqeeti (may Allaah have mercy on him) said in Adwa’ 
    al-Bayaan (3/397), responding to those who said that al-Khidr is still 
    alive on the basis that the general meaning of the words of the Prophet  
    (peace and blessings of Allaah be upon him) does not include absolutely 
    everyone, i.e., the words “there will no one left who is on the face of the 
    earth”: Because the hadeeth about the emergence of the Dajjaal is a sound 
    hadeeth, and that means that the Dajjaal is exempted from the general 
    meaning of the hadeeth of Ibn ‘Umar. It is a hadeeth that is proven in 
    al-Saheeh, from the words of Faatimah bint Qays (may Allaah be pleased 
    with her), who heard the Prophet  (peace and blessings of Allaah be upon 
    him) say that Tameem al-Daari spoke to him, and that he liked what Tameem 
    al-Daari told him, because it was in accordance with what he was telling his 
    companions about the Dajjaal. Then he quoted the hadeeth of Tameem. Then he 
    said: 
This clearly states that 
    the Dajjaal is alive on that island in the sea that is mentioned in the 
    hadeeth of Tameem al-Daari, and that he will remain alive until he emerges 
    at the end of time. This is a text which is specific in meaning and excludes 
    the Dajjaal from the general meaning of the hadeeth which says that everyone 
    would die within the next century. The established principle in usool is 
    that the general meaning should be taken as such, and that whatever is 
    excluded from it on the basis of a specific text is excluded from the 
    general meaning, but the general meaning still remains applicable to all 
    individuals for whom there is no evidence that they are excluded. As we have 
    stated several times previously, this is the truth and is the view of the 
    majority, and it applies to most of what is in the Qur’aan and Sunnah of 
    general matters from which a few individuals are excluded on the basis of a 
    specific text, but the general meaning remains applicable to the rest. End 
    quote. 
And Allaah knows best.