upgrade path from the <A HREF="../../solidbase/core/PatchFile.html" title="class in solidbase.core"><CODE>PatchFile</CODE></A>, and reads commands from it. It
 calls the <A HREF="../../solidbase/core/CommandListener.html" title="interface in solidbase.core"><CODE>CommandListener</CODE></A>s, updates the DBVERSION and DBVERSIONLOG tables through <A HREF="../../solidbase/core/DBVersion.html" title="class in solidbase.core"><CODE>DBVersion</CODE></A>, calls
 the <A HREF="../../solidbase/core/Database.html" tit