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diff --git a/pkg/tbtables/fitsio/ftp3db.f b/pkg/tbtables/fitsio/ftp3db.f
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+C--------------------------------------------------------------------------
+        subroutine ftp3db(ounit,group,dim1,dim2,nx,ny,nz,array,status)
+
+C       Write a 3-d cube of byte values into the primary array.
+C       Data conversion and scaling will be performed if necessary
+C       (e.g, if the datatype of the FITS array is not the same
+C       as the array being written).
+
+C       ounit   i  Fortran output unit number
+C       group   i  number of the data group, if any
+C       dim1    i  actual first dimension of ARRAY
+C       dim2    i  actual second dimension of ARRAY
+C       nx      i  size of the cube in the x direction
+C       ny      i  size of the cube in the y direction
+C       nz      i  size of the cube in the z direction
+C       array   c*1  the array of values to be written
+C       status  i  returned error stataus
+
+C       written by Wm Pence, HEASARC/GSFC, June 1991
+
+        integer ounit,group,dim1,dim2,nx,ny,nz,status
+        character*1 array(dim1,dim2,*)
+        integer fpixel,row,band
+
+        fpixel=1
+        do 20 band=1,nz
+        do 10 row = 1,ny
+            call ftpprb(ounit,group,fpixel,nx,array(1,row,band),status)
+            fpixel=fpixel+nx
+10      continue
+20      continue
+
+        end