BDSIR

[geo]

Dear all
I'm tring to set a BDSIR model (96 sequences-700nt long-serilly sampled)  but I always obtain the following message:
Start likelihood: -Infinity after 11 initialisation attempts
P(posterior) = -Infinity (was NaN)
    P(prior) = -Infinity (was NaN)
        P(BirthDeathSkySerial.t:Seq_Pcv2a) = -362.1885477869971 (was NaN)
        P(R0PriorS.t:Seq_Pcv2a) = -16.30738630443746 (was NaN)
        P(becomeUninfectiousRatePriorS.t:Seq_Pcv2a) = -9.189385332046724 (was NaN)
        P(GammaShapePrior.s:Seq_Pcv2a) = -1.0 (was NaN)
        P(KappaPrior.s:Seq_Pcv2a) = -1.8653600339742873 (was NaN)
        P(MutationRatePrior.s:Seq_Pcv2a) = 0.0 (was NaN)
        P(origRootPriorS.t:Seq_Pcv2a) = -6.907755278982137 (was NaN)
        P(MeanRatePrior.c:Seq_Pcv2a) = NaN (was NaN)
        P(ucldStdevPrior.c:Seq_Pcv2a) = -0.40143772133305716 (was NaN)
    P(likelihood) = NaN (was NaN)
        P(treeLikelihood.Seq_Pcv2a) = NaN (was NaN)
    P(fossilCalibrations) = 0.0 (was NaN)
java.lang.Exception: Could not find a proper state to initialise. Perhaps try another seed.
    at beast.core.MCMC.run(Unknown Source)
    at beast.app.BeastMCMC.run(Unknown Source)
    at beast.app.beastapp.BeastMain.<init>(Unknown Source)
    at beast.app.beastapp.BeastMain.main(Unknown Source)

I've tried with different priors and fixing some parameters but apprently nothing change
does anybody has encountered a similar problem?
thanks
Geo

[Denise]

Dear Geo,

This sometimes happens when your initial tree height is larger than the origin value. Have you tried setting the initial origin value to something large?

Cheers

Denise