The openMSE package must be loaded at the beginning of each new R session:

library(openMSE)

## Loading required package: MSEtool

## Loading required package: snowfall

## Loading required package: snow

## Loading required package: DLMtool

## Loading required package: SAMtool

The three core packages MSEtool, DLMtool, and SAMtool are loaded, as well as the snowfall and snow packages which are required for parallel processing.