mlogit example produces an error

[Sam Crawley]

The example for mlogit from the documentation does not work for me:

library("prediction")
library(mlogit)

data("Fishing", package = "mlogit")
Fish <- mlogit.data(Fishing, varying = c(2:9), shape = "wide", choice = "mode")
mod <- mlogit(mode ~ price + catch, data = Fish)
prediction(mod)

Produces: Error in tmp[["fit"]] : subscript out of bounds

traceback:

4: data.frame(..., check.rows = FALSE, check.names = FALSE, fix.empty.names = FALSE, 
       stringsAsFactors = FALSE)
3: make_data_frame(data, fitted = tmp[["fit"]], se.fitted = tmp[["se.fit"]])
2: prediction.default(mod)
1: prediction(mod)

sessionInfo:

R version 3.6.0 (2019-04-26)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 18.04.2 LTS

Matrix products: default
BLAS:   /usr/lib/x86_64-linux-gnu/atlas/libblas.so.3.10.3
LAPACK: /usr/lib/x86_64-linux-gnu/atlas/liblapack.so.3.10.3

locale:
 [1] LC_CTYPE=en_NZ.UTF-8       LC_NUMERIC=C               LC_TIME=en_NZ.UTF-8        LC_COLLATE=en_NZ.UTF-8     LC_MONETARY=en_NZ.UTF-8   
 [6] LC_MESSAGES=en_NZ.UTF-8    LC_PAPER=en_NZ.UTF-8       LC_NAME=C                  LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_NZ.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] mlogit_0.4-2      lmtest_0.9-37     zoo_1.8-6         Formula_1.2-3     prediction_0.3.14

loaded via a namespace (and not attached):
 [1] lattice_0.20-38   MASS_7.3-51.4     grid_3.6.0        magrittr_1.5      bibtex_0.4.2      Rdpack_0.11-0     stringi_1.4.3     data.table_1.12.2
 [9] statmod_1.4.32    tools_3.6.0       stringr_1.4.0     yaml_2.2.0        compiler_3.6.0    gbRd_0.4-11 

[Thomas J. Leeper]

Thanks - I'll investigate.

[Thomas J. Leeper]

Hmm. Unfortunately, I'm not able to reproduce this error.