INPUT INSTRUCTIONS

  TITLE:mediater moderator;
  DATA:FILE IS C:\Users\DONG\Desktop\123.txt;
  VARIABLE:
  NAMES ARE b1-b3 NA NEW ML;
  USEVARIABLE = b1-b3 NA NEW ML int;
  DEFINE:
  bore=SUM(b1-b3);
  CENTER bore ML (GRANDMEAN);int=bore*ML;
  ANALYSIS: BOOTSTRAP=1000;
  MODEL:
  NEW on bore ML int;
  NA on bore ML int;
  NA on NEW;
  OUTPUT:STANDARDIZED CINTERVAL(BCBOOTSTRAP);

*** ERROR in DEFINE command
  Variable(s) used with the CENTER function must be used in the analysis.
  Unknown variable(s):  BORE