Yohkoh Software version numbers are used for system maintenance and to facilitate problem reporting and tracking. The version numbers consist of two fields of the form:
YYMMDD.NN Where: YYMMDD = Date of Release
NN = Major Release Number
There are two types of ``Releases'', both of which are accompanied by an update to the date field. A ``Major Release'', accompanied by an increment of ``NN'', is generated when there is a major restructuring (deletions, renaming, moves) of the Yohkoh tree. A ``Major Release'' requires that remote sites execute a full upgrade (which copies over all of the ys tar files except site). A ``Minor Release'' is generated when there are a large number of additions to the tree, but not other restructuring. Remote sites can upgrade to new minor release levels with an incremental file - a minor release is a method of maintaining the incremental files at reasonable sizes. Upgrades to new major and minor release levels are both automatically accomplished by the upgrade scripts ys_install. Version numbers at remote sites are compared to the version numbers on the master copy (currently isass0) and the appropriate files are transferred and installed. To determine the Yohkoh Software version you are running type: % tail -1 $ys/gen/setup/ys.versionWhen reporting problems, please include the Software version number within the message.