SMF data from system zzz within sysplex xxx for coupling facility yyy and reporting interval start at mm/dd/yyyy hh.mm.ss does not cover the whole sysplex reporting interval. This message is repeated every time incomplete data is detected. In addition the note "DATA FROM SEVERAL SYSTEMS IS MISSING OR INCOMPLETE! REPORTED DATA MAY BE INEXACT!" is written on each of the coupling facility report parts. In the Coupling Facility Subchannel Activity report and the Coupling Facility Structure Activity report every system name for which data is not complete is marked with a "*".