read_engine_dtmin.F

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!||====================================================================
!||    read_engine_dtmin   ../starter/source/general_controls/damping/read_engine_dtmin.F
!||--- called by ------------------------------------------------------
!||    dampdtnoda          ../starter/source/general_controls/damping/dampdtnoda.F
!||--- uses       -----------------------------------------------------
!||    message_mod         ../starter/share/message_module/message_mod.F
!||====================================================================
      SUBROUTINE read_engine_dtmin(DTMIN)
C-----------------------------------------------
C   M o d u l e s
C-----------------------------------------------
      USE message_mod
      USE inoutfile_mod
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#include      "scr15_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      my_real , INTENT(OUT) :: dtmin 
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER IO_ERR1, IFUND
      CHARACTER FILNAM*109, KEYA*80, KEYA2*80
 
      INTEGER :: LEN_TMP_NAME
      CHARACTER(len=4096) :: TMP_NAME
      my_real
     .   dfac
C-----------------------------------------------
      io_err1=0
      dtmin = zero
C-----------------------------------------------   
      filnam=rootnam(1:rootlen)//'_0001.rad'
 
      tmp_name=infile_name(1:infile_name_len)//filnam(1:rootlen+9)
      len_tmp_name = infile_name_len+rootlen+9
      OPEN(unit=71,file=tmp_name(1:len_tmp_name),
     .        access='SEQUENTIAL',status='OLD',iostat=io_err1)
C
      IF (io_err1/=0) THEN
         filnam=rootnam(1:rootlen)//'D01'
         tmp_name=infile_name(1:infile_name_len)//filnam(1:rootlen+3)
         len_tmp_name = infile_name_len+rootlen+3
         OPEN(unit=71,file=tmp_name(1:len_tmp_name),
     .        access='SEQUENTIAL',status='OLD',iostat=io_err1)
      ENDIF      
 
      IF (io_err1==0) THEN
C
        ifund = 0
        DO WHILE (ifund==0)
          READ(71,'(A)',END=20) keya
C
          IF(keya(1:12)=='/DT/NODA/CST') THEN
            READ(71,*,err=20,END=20) DFAC,dtmin
            ifund = 1
          ENDIF
C
        END DO
C
 20     CONTINUE
 
        CLOSE(71)
      ENDIF
C------------------------------------------- 
      RETURN
      END