REO Reorganise Library/ISAM File

REO Reorganise. The designated library or ISAM file is reorganised, in that all elements are transfered to a temporary file. The contents of this temporary file are then copied back to the original library (ISAM file), and the surplus disc space is released with /FILE ...,SPACE=-9999. Frequent deletions and additions to libraries create "holes" which can be removed by this REO Action. The library is "repacked" and uses less space afterwards.