请教下大神们，我在用mplus做潜剖面分析后续分析时报错
*** ERROR in VARIABLE command  Unrecognized type in the AUXILIARY option:  BCH
  for variable(s):  Y
求解释下是什么原因，要怎么解决！



代码如下：


  Title: BCH analysis
    DATA:file is triangle.dat;
    VARIABLE: names are age gender single M1 M2 M3
  M4a
  M4b
  M4c
  M4d
  Y1a
  Y1b
  Y1c
  Y1
  Y2a
  Y2b
  Y2
  Y
  X1a
  X2a
  X2b
  X2;


    usevariables are M1 M2 M3 Y;
    !categorical =b1-b27;
    classes =c(4);
    Auxiliary = Y(BCH);




  analysis:
    type=mixture;