Aspen反应器外挂FORTRAN

谢名财520

*** SEVERE ERROR
      COULD NOT RESOLVE USER OR IN-LINE FORTRAN SUBROUTINE(S):

      SUBROUTINE "LTKIN" IS MISSING

  *** SEVERE ERROR
      PROGRAM TERMINATED DUE TO UNRESOLVED ROUTINES

! Errors while processing input specifications
大神们啊，这些问题是fortran程序出错还是链接Aspen出问题了，或者是因为丢失了一些子程序，因为我的高低变反应程序是从整个合成氨反应器USER模型中截取下来的，会不会导致缺损不完整啊？求助！！！急用啊!!!