step: Stubs for non-working step, stepAIC functions
In bbolker/glmmadmb: Generalized Linear Mixed Models using 'AD Model Builder'

Description Usage Arguments Value Note

step (from the stats package in base R) and stepAIC (from the MASS package) do not currently work properly with glmmadmb fits. These functions are an attempt to intercept such use.

1 2	step(...) stepAIC(...)

...

stub

None (error).

drop1 does work for single-step deletions (presumably add1 works as well, although it has not been tested).
One can still shoot oneself in the foot by loading the MASS package after glmmADMB and ignoring or suppressing the warnings about masking of the stepAIC function.