I am trying to create a consensus ultrametric phylogenetic trees with a file with multiple trees (around 100), where the branch lengths correspond to time. However, functions like consensus() in R packages like "ape" do not give you branch length information and I am interested in having a consensus tree with age information. I tried to do it with MrBayes, but when I load the trees file (nexus), it asks you for a matrix information, because it interpreted that you are doing a consensus tree from a previous bayesian analysis performed in MrBayes, which is not the case.

Any suggestions? Thanks in advance!