CREATE/TABL test 2 4011 infile.txt
!READ/TABL   test.tbl
CREATE/IMAG ref_image 1,4011 3800.600,0.9 NODATA
CONVER/TABL  img = test #1 #2 ref_image spline
!EXTRAC/IMAG imgcut = img [3800.6:7409.6]
OUTDIS/FITS img infile_spline.fits