The head of the national inquiry into missing and murdered indigenous women says the commission accepts full responsibility for delays and poor communication but more time and money are needed to finish the 鈥渢remendous work鈥� that has already been done.

Marion Buller responded Friday to concerns outlined in an open letter from more than 30 advocates, aboriginal leaders and family members that the process is in 鈥渟erious trouble.鈥�

The problem is one of communication, Buller told a news conference at the First Nations House of Learning on the campus of the University of British Columbia.

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鈥淚 don鈥檛 think it鈥檚 a matter of leadership. I don鈥檛 think it鈥檚 a matter of staff issues. It鈥檚 our fault for not communicating the tremendous work we have already accomplished,鈥� Buller said.

鈥淭he top priority for the national inquiry is to let the whole country know the tremendous work we have already done and the work that we plan to do and how we鈥檙e going to carry out that work.鈥�

Buller, the first female First Nations judge in B.C., and four other commissioners are overseeing the inquiry, which launched in September and was expected to take two years and cost $53.8 million. Buller said work has begun on a new timeline and budget, but couldn鈥檛 say when details would be released.

Earlier this week, Indigenous Affairs Minister Carolyn Bennett responded to the open letter, saying she shares the concerns of family members who are growing more anxious about the inquiry.

The group, which published its comments Monday on the website of Metis artist Christi Belcourt, said it is aware the commission faces a difficult challenge, but it noted immediate action must be taken to shift the current approach and prevent damage.

Buller said she understands that some people want the commission to proceed faster and she hears the frustration of those who have waited up to 40 years for answers.

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But she said there are others who are telling the commission to take its time and be careful and respectful so that it doesn鈥檛 cause any more damage or retraumatize people.

鈥淚 understand where they are coming from too, because they don鈥檛 want the hurt to continue,鈥� Buller said.

鈥淭he commissioners and I share one important concern above all, and that鈥檚 our fear of retraumatizing people,鈥� she added. 鈥淚t鈥檚 a concern we live with daily and we take very seriously.鈥�

Buller said a lot of work has been done behind the scenes and she still expects to release the commission鈥檚 first report in November.

鈥淭here is still a lot of hope out there,鈥� she said. 鈥淲e still enjoy the support of many family members across Canada, many survivors across Canada. We continue to receive letters, emails, telephone calls of people saying we support what you are doing. We receive some great comments of what we can do better.鈥�

Buller said the commission could have started a courtroom-like inquiry months ago because that has been done many times before, but this inquiry is different.

鈥淲e want to take a decolonized, indigenous approach to this work that will do no further harm. You can鈥檛 roll that out in a couple of months. It takes time to do it right and we intend to do it right. That鈥檚 the only way that鈥檚 fair, to honour the spirits of the lost women and girls, and to honour the spirits of the survivors.鈥�

The commission is set to hold its first public hearing May 29 in Whitehorse in a tent instead of a courtroom.

Other community meetings won鈥檛 take place until later in the fall at the earliest.

Feb. 15, 2017: More than 100 people gathered outside the Kelowna courthouse Tuesday evening for the 6th annual Murder and Missing Indigenous woman鈥檚 memorial vigil.

Geordon Omand, The Canadian Press