Running examples in ‘emmeans-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: emmip
> ### Title: Interaction-style plots for estimated marginal means
> ### Aliases: emmip emmip.default emmip_ggplot emmip_lattice
> 
> ### ** Examples
> 
> #--- Three-factor example
> noise.lm = lm(noise ~ size * type * side, data = auto.noise)
> 
> # Separate interaction plots of size by type, for each side
> emmip(noise.lm, type ~ size | side)
> 
> # One interaction plot, using combinations of size and side as the x factor
> # ... with added confidence intervals and some formatting changes
> emmip(noise.lm, type ~ side * size, CIs = TRUE,
+     CIarg = list(lwd = 1, alpha = 1, color = "cyan"),
+     dotarg = list(color = "black"))
> 
> # Create a black-and-white version of above with different linetypes
> # (Let the linetypes and symbols default to the palette)
> emmip(noise.lm, type ~ side * size, CIs = TRUE, col = "black",
+       linearg = list(), dotarg = list(size = 2), CIarg = list(alpha = 1)) +
+     ggplot2::theme_bw()
> 
> # One interaction plot using combinations of type and side as the trace factor
> emmip(noise.lm, type * side ~ size)
> 
> # Individual traces in panels
> emmip(noise.lm, ~ size | type * side)
> 
> # Example for the 'style' argument
> fib.lm = lm(strength ~ machine * sqrt(diameter), data = fiber)
> fib.rg = ref_grid(fib.lm, at = list(diameter = c(3.5, 4, 4.5, 5, 5.5, 6)^2))
> emmip(fib.rg, machine ~ diameter)   # curves (because diameter is numeric)
> emmip(fib.rg, machine ~ diameter, style = "factor")  # points and lines
> 
> # For an example using extra ggplot2 code, see 'vignette("messy-data")',
> # in the section on nested models.
> 
> ### Options with transformations or link functions
> neuralgia.glm <- glm(Pain ~ Treatment * Sex + Age, family = binomial(), 
+                      data = neuralgia) 
> 
> # On link scale:
> emmip(neuralgia.glm, Treatment ~ Sex)
> 
> # On response scale:
> emmip(neuralgia.glm, Treatment ~ Sex, type = "response")
> 
> # With transformed axis scale and custom scale divisions
> emmip(neuralgia.glm, Treatment ~ Sex, type = "scale",
+     breaks = seq(0.10, 0.90, by = 0.10))
Failed with error:  ‘unused argument (quiet = TRUE)’
Error in .make.scale(emmo@misc) : 
  type = "scale" requires the 'scales' package to be installed
Calls: emmip -> emmip.default -> .make.scale
Execution halted