R help - Apr 2019 - MuMIn package with gamlss error

Hello,

could you please provide your thoughts on what I may be missing? gamlss models
are supposedly supported by MuMIn yet this one fails:

library(MuMIn)

#this lm runs
linearMod <- lm(Sepal.Length ~ ., data=iris)?
options(na.action = "na.fail")
res <-dredge(linearMod,beta = T, evaluate = T)
confset.95p<-get.models(res, subset = cumsum(weight) <= .95)
avgm <- model.avg(confset.95p)
predict(avgm,se.fit = TRUE, type="response")

#this gamlss fails on dredge(), and writing out the formula does not solve the
initial error...
gamlssMod <- gamlss(Sepal.Length ~ ., data=iris,)?
res <-dredge(gamlssMod,beta = T, evaluate = T)
confset.95p<-get.models(res, subset = cumsum(weight) <= .95)
avgm <- model.avg(confset.95p)
predict(avgm,se.fit = TRUE, type="response")
options(na.action = "na.omit")?


appreciate any thoughts you may have,

Andras?