Secretary of State Cyrus R. Vance had "no reaction" last night to King Hussein's warnings about the Camp David agreements, according to spokesman Hodding Carter.

Earlier Vance had continued to express hope that he would win Hussein's agreement to participate in the arrangements set up by Egypt and Israel at Camp David for civil self-rule on the West Bank of the Jordan River and a negotiating process for the area's future.

Vance has given no hint that his conversations with Hussein in Amman were anything but friendly and constructive.

As the Jordanian king announced his stand in Amman, Vance was on a sightseeing tour of the oilfield region of Dhahran and a naval base being built for the Saudis by the United States at Jubail on the Arabian Gulf. The tour was arranged as a way for Vance to spend the day after he agreed to postpone his trip to Syria for 24 hours.

The postponment was at the request of Syrian President Hafez Assad, who is playing host to militant Arab leaders, including Yasser Arafat of the Palestine Liberation organization, in a conference dedicted to attacking the Camp David Accords.

Vance is scheduled to fily to Damascus early today and home to Washington late tonight.