Hi Fezile, the other option is to use JAGS if you are willing to go the Bayesian way. This is a bit more involved but you might find the added flexibility useful for this (and future) modeling problems. Best, Denis -----Original Message----- From: UF R Users List [mailto:[log in to unmask]] On Behalf Of Mtsetfwa,Fezile P Sent: Monday, July 23, 2018 2:51 PM To: [log in to unmask] Subject: GLMM & zero-inflated count data Hi all, I am trying to run glmms for zero-inflated count data using the package glmmADMB but I can't even get the program to download. I have tried install.packages, devtools and other ways, nothing. Has anyone used this package? Any suggestions? Are there any other packages I can use for zero inflated data that can support a negative binomial distribution? Thanks! This list strives to be beginner friendly. However, we still ask that you PLEASE do read the posting guide https://urldefense.proofpoint.com/v2/url?u=http-3A__www.R-2Dproject.org_posting-2Dguide.html&d=DwIGaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=zAVYZd3B5rRMa_OS6MyRQQ&m=75zDimpku0VGvJSKQ9C_jtIOzsCJnYF_mxDwNMPSeLw&s=qRdTVObad76MOkgoHa6IPlKEzwrNXHBl1JnTPJoxwbQ&e= and provide commented, minimal, self-contained, reproducible code. This list strives to be beginner friendly. However, we still ask that you PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.