At March end close, the depreciation rule should be run by 30th April to post all depreciation to 31st March. If the rule is run from 1st May onwards it will post depreciation to 30th April. This treatment will apply at any point throughout the financial year that the depreciation rule is run.
Version 6
When running the depreciation rule in version 6 the "Dep_Period" field tells the system what Yearcode and Period you would like to run the depreciation rule up to. This should be populated with "2016/17.07" to post depreciation up until March 2017.