Hello, I was using Zelig yesterday (Mac OS 10.7.2, R 2.13.0 x86_64-apple-darwin9.8.0/x86_64 (64-bit), Zelig 3.5.3, VGAM 0.8-4) and everything was working just fine. However, this morning I updated all of my R packages and now I cannot even run the sample commands in the Zelig manual (and my project is due soon!). I have no idea how to fix this -- what should I do? "mlogit", data = mexico) Error in dyn.load(file, DLLpath = DLLpath, ...) : unable to load shared object '/Library/Frameworks/R.framework/Versions/2.13/Resources/library/VGAM/libs/x86_64/VGAM.so': dlopen(/Library/Frameworks/R.framework/Versions/2.13/Resources/library/VGAM/libs/x86_64/VGAM.so, 6): Library not loaded: /usr/local/lib/libgfortran.2.dylib Referenced from: /Library/Frameworks/R.framework/Versions/2.13/Resources/library/VGAM/libs/x86_64/VGAM.so Reason: image not found Error in loadModelDeps(model) : This model depends on package "VGAM". Please install this package and try again In addition: Warning message: package 'VGAM' was built under R version 2.13.2 Error: package/namespace load failed for 'VGAM' trying URL ' http://software.rc.fas.harvard.edu/mirrors/R/bin/macosx/leopard/contrib/2.1… ' Content type 'application/x-gzip' length 4525473 bytes (4.3 Mb) opened URL ================================================== downloaded 4.3 Mb The downloaded packages are in /var/folders/0z/6lnh31r9211fldsd3hxl7zdw0000gn/T//Rtmpy6JZzF/downloaded_packages Any help would be greatly appreciated. I **really** like the Zelig framework, but if I can't get this to work soon then unfortunately I'll have to use SAS instead, which would be a real bummer. Thanks! Mike -- Michael Daly, MSc University of California, Irvine, School of Medicine Medical Student, Year IV -- Research Year Beth Israel Deaconess Medical Center Dr. Charles Day's Orthopaedic Surgery Research Group mcdaly(a)bidmc.harvard.edu | (925) 997-2786