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Problems reading binary file in FORTRAN

  1. Sep 8, 2008 #1
    I am having problems reading a binary file in FORTRAN. I know that the file was generated by the code below:

    open(7,file='hctd1_kxx.dat',form='unformatted')
    ...
    write(7) iscl
    write(7) inode,npoints
    write(7) (kxm(i)*(10**(prop(i))),i=1,npoints)
    close(7)

    iscl, inode, npoints are integer*4 and kxm(), prop() are real*4

    I am trying to read the file using the code below (variables have consistent data types and sizes):

    open(11,file='hctd1_kxx.dat',status='old', form='unformatted', ACTION='READ')
    ...
    read(7) iscl
    read(7) inode,npoints
    read(7) (single(i),i=1,npoints)

    The program reads OK until it reaches the line above, where it always crashes after performing 256 iterations (it should go to npoints=406924).

    I tried different input files and opening the file using different options for the CONVERT specifier and it keeps crashing after the first 256 entries.

    The error message I get is the following: "forrtl: severe (67): input statement requires too much data".

    Does anyone have any suggestions?

    Thanks a lot for your attention!

    Marcelo
    P.S.: my compiler is Compaq Visual Fortran 6.5
     
  2. jcsd
  3. Sep 10, 2008 #2
    Have you checked that it creates a file of the correct size before you try to read the data back?
     
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