By default, this plugin purges the workspace for every build. There are a number of operations which when performed in AccuRev, can make it impossible for a client to successfully complete an accurev update operation with the workspace populated. The sequence of purge, update, populate has not failed. The down side is that it is slower.

Selecting this option will enable the plugin to skip the purge step and just use update (followed by a populate just in case any files went missing). NOTE: however, in order to allow Jenkins to recover from the "cannot complete update" situation a purge will always be performed if the last build failed.