Help!! end-of-file during read, unit 1...
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From: JuanPablo-Chile on 15 Apr 2010 12:38 Hi Fellas: If somebody has a few minutes I would appreciate it. I got the following error when compyling my code: Error-------------------------------------------------- forrtl: severe (24): end of file during read unit 1, file:C\....... What I want to read is this: (file: apartado1.dat)__________________ (10: size of the matrix, the rest, the values of my matrix) 10 .7582 -.6919 .6802 -1.0725 .8998 -2.1231 .2847 -. 7333 -.7734 .1518 -.3368 .9708 -.1072 1.0135 -.4753 .0689 .3986 1.1163 .6205 -.2877 -1.3718 -.6859 .3317 -.9977 .2914 1.1071 .2450 . 1650 .4062 1.2160 1.4484 -1.0251 .2054 .5889 -.2640 2.4953 .8559 -. 8510 .8119 .7002 .7599 -1.7129 1.5370 -1.6098 1.1095 -1.1097 .3855 . 9652 .8183 .0370 -.9260 -.1119 -.8030 -1.6650 -.9014 .5883 .5542 -. 4152 .0618 .4574 .1990 .2576 2.0807 -2.2772 .3390 .2899 .6623 -. 5809 .8878 .1719 .8488 .9638 1.3219 -.0643 1.3171 .2280 -1.4296 -. 1497 -.5050 -1.7291 -.4175 -.6150 .7208 .3394 .8828 .2842 -.1455 -. 0896 .2892 1.1648 .8057 -1.3556 .1209 -.2222 .5717 -.3001 1.1343 -. 1794 -1.4671 1.3953 My code (if somebody hast the time to try it): ---------------------------------------------------------------------------------------------------------------------- implicit real*8 (a-h,o-z) parameter (na_max= 100) dimension a(na_max,na_max),v(na_max),w(na_max) open (unit=1,file='apartado1.dat',status='old') read (1,1020) ndim write (6,*) ndim do 69 i=1,ndim read (1,1041) (a(i,j), j=1,ndim) 69 continue write (6,*) a(1,1) c----- writing the results call write_result(ndim,a,v,w,x) close(1) stop 1020 format(2I8) 1041 format(1F8.4) c stop end c------------------------------------------------------- c----- Writing the results subroutine write_result(n,a_mat,b,c,x) implicit real*8 (a-h,o-z) dimension a_mat(n,n),b(n),c(n) open (unit=10,file='results.dat',status='old') write (10,10) do 20 i=1,n write (10,30) (a_mat(i,j),j=1,n) 20 continue close(10) 10 format ('The Matrix input is: '/) 30 format (5(1x,1pe14.6)) return end --------------------------------------------------------------------------------------- Last comments: The thing is that I am leraning how to read files in fortran. After a few headaches I have done this code. I can read the value 10, as you can see after running the code. Now I want to read the values of the matrix, I got many mistakes because of the format how to read the numbers and save them in a file (results.dat). after a few modifications the problem seems to solved but a new kind of error appears, the end-of-file stuff. Well, thanks to all for all this time reading this forum. Thanks to the Fortran community
From: Gordon Sande on 15 Apr 2010 12:54 On 2010-04-15 13:38:21 -0300, JuanPablo-Chile <jpsegura(a)gmail.com> said: > Hi Fellas: > > If somebody has a few minutes I would appreciate it. I got the > following error when compyling my code: > > Error-------------------------------------------------- > forrtl: severe (24): end of file during read unit 1, file:C\....... > > > What I want to read is this: (file: apartado1.dat)__________________ > (10: size of the matrix, the rest, the values of my matrix) > 10 > .7582 -.6919 .6802 -1.0725 .8998 -2.1231 .2847 -. > 7333 -.7734 .1518 > -.3368 .9708 -.1072 1.0135 -.4753 .0689 .3986 > 1.1163 .6205 -.2877 > -1.3718 -.6859 .3317 -.9977 .2914 1.1071 .2450 . > 1650 .4062 1.2160 > 1.4484 -1.0251 .2054 .5889 -.2640 2.4953 .8559 -. > 8510 .8119 .7002 > .7599 -1.7129 1.5370 -1.6098 1.1095 -1.1097 .3855 . > 9652 .8183 .0370 > -.9260 -.1119 -.8030 -1.6650 -.9014 .5883 .5542 -. > 4152 .0618 .4574 > .1990 .2576 2.0807 -2.2772 .3390 .2899 .6623 -. > 5809 .8878 .1719 > .8488 .9638 1.3219 -.0643 1.3171 .2280 -1.4296 -. > 1497 -.5050 -1.7291 > -.4175 -.6150 .7208 .3394 .8828 .2842 -.1455 -. > 0896 .2892 1.1648 > .8057 -1.3556 .1209 -.2222 .5717 -.3001 1.1343 -. > 1794 -1.4671 1.3953 > > My code (if somebody hast the time to try it): > ---------------------------------------------------------------------------------------------------------------------- > > implicit real*8 (a-h,o-z) > parameter (na_max= 100) > dimension a(na_max,na_max),v(na_max),w(na_max) > > open (unit=1,file='apartado1.dat',status='old') > read (1,1020) ndim > write (6,*) ndim > > do 69 i=1,ndim > read (1,1041) (a(i,j), j=1,ndim) > 69 continue > write (6,*) a(1,1) > > c----- writing the results > call write_result(ndim,a,v,w,x) > > close(1) > stop > > 1020 format(2I8) > 1041 format(1F8.4) > c stop > end > > c------------------------------------------------------- > c----- Writing the results > subroutine write_result(n,a_mat,b,c,x) > implicit real*8 (a-h,o-z) > dimension a_mat(n,n),b(n),c(n) > > open (unit=10,file='results.dat',status='old') > > write (10,10) > do 20 i=1,n > write (10,30) (a_mat(i,j),j=1,n) > 20 continue > > close(10) > > 10 format ('The Matrix input is: '/) > 30 format (5(1x,1pe14.6)) > > return > end > > --------------------------------------------------------------------------------------- Last > > comments: > > The thing is that I am leraning how to read files in fortran. After a > few headaches I have done this code. I can read the value 10, as you > can see after running the code. Now I want to read the values of the > matrix, I got many mistakes because of the format how to read the > numbers and save them in a file (results.dat). after a few > modifications the problem seems to solved but a new kind of error > appears, the end-of-file stuff. > > Well, thanks to all for all this time reading this forum. > > Thanks to the Fortran community Hint 1: Write what was read immediately while debugging. Was it the first or the last read that failed? You don't know from what was shown. Hint 2: End-of-file is sometimes a problem with the last record being incomplete due to a missing end-of-line because of text processing problems. Add an extra blank line for a quick check. Read all the options for you text editor to have it force an end-of-line at end (or get a better text editor which will). These hints are based on common problems of this sort as I did not read your code becasuse you failed to say which version of which compiler on which computer. But you get credit for showing the exact error and all the code.
From: Richard Maine on 15 Apr 2010 13:23 JuanPablo-Chile <jpsegura(a)gmail.com> wrote: > I got the following error when compyling my code: > forrtl: severe (24): end of file during read unit 1, file:C\....... I seriously doubt you got that error while compiling. That would be an error from running it. But anyway... > 10 > .7582 -.6919 .6802 -1.0725 .8998 -2.1231 .2847 -. > 7333 -.7734 .1518 .... [mostly elided] > do 69 i=1,ndim > read (1,1041) (a(i,j), j=1,ndim) > 69 continue .... > 1041 format(1F8.4) Note the "1" in the 1F8.4 in your format. This format defines 1 field on a line - that's all. When your read statement tries to read 10 values, this means that it reads 1 of them from the first line, since that's all your format said to read from a line. Since there are still more values to read, goes to the next line and reuses the format, reading 1 value from that line. (This is called "format reversion" and in some cases reuses only part of the format, but in your simple case, it reuses the whole thing). The important part is that when when the format is used up, the reading then goes to the next line as part of reusing the format. It does not multiply the effect of the format on the same line. Thus the read statement for what you intend to be the first row ends up reading 1 value from each of 10 lines instead of 10 values from 1 line. When you try to tead the second row, you are at the end of the file. Your format statement needs to be at least 10F8.4 to read 10 values from a single line. It is harmless for the repeat factor (the 10) to be larger than the number of values to be read, but if it it too small, you will get the kind of behavior you are seeing. I recomend using a value sufficiently large that it will always be large enough. For example, you could use something like 999F8.4. There are more sophisticated ways to handle such things, including ways that don't require you to come up with a value guaranteed to be large enough, but I would guess that this simple version is adequate for your current purposes. -- Richard Maine | Good judgment comes from experience; email: last name at domain . net | experience comes from bad judgment. domain: summertriangle | -- Mark Twain
From: Tobias Burnus on 15 Apr 2010 13:35 On 04/15/2010 07:23 PM, Richard Maine wrote: > For example, you > could use something like 999F8.4. > > There are more sophisticated ways to handle such things, including ways > that don't require you to come up with a value guaranteed to be large > enough, For instance in Fortran 2008; instead of 999F8.4 one can then write *F8.4. Thus, if you have one of the very few compilers which already implement it ... Tobias
From: JuanPablo-Chile on 15 Apr 2010 15:35
Hi: I changed the code as you recommended and now I am geeting the next error: forrtl: severe (64): input conversion error, unit 1, fil C:\..... -------------------------------------------------- the new line in the code: .... 1020 format(2I8) 1041 format(999F8.4) .... ----------------------------------------------------- just in case I am using Visual Fortran 5.0 (Microsoft Developer Studio 97) Jp |