[Help-gsl] gsl: fwrite_source.c:64: ERROR: fread failed

[Fred J.]

Hello

when I run the following code, I get the following
error. 
would appriciate some help as my first post of a
similar problem may have been lacking some info.  


thanks


***************code***************
#include <cstdio>
#include "/usr/include/gsl/gsl_matrix.h"
#include "/usr/include/gsl/gsl_sf_bessel.h"
   {
      gsl_matrix * m = gsl_matrix_alloc(6, 18);
      FILE * iF = fopen( "/home/sam/data.file", "r" );
      gsl_matrix_fread(iF, m);
      fclose(iF);
   }
***************error***************
gsl: fwrite_source.c:64: ERROR: fread failed
Default GSL error handler invoked.

Program received signal SIGABRT, Aborted.
0x404a0ee9 in raise () from /lib/tls/libc.so.6



********************my
configurations********************
Linux debian 2.6.8 #1 Sat Aug 28 18:22:21 EST 2004
i686 GNU/Linux

installed pacakges are:
libgsl0       1.5-2
libgsl0-dev   1.5-2
atlas3-base    3.6.0-16
atlas3-base-de 3.6.0-16
atlas3-doc     3.6.0-16
atlas3-headers 3.6.0-16
gcc            3.3.4-2 

the exmple code in the doc. runs ok.
#include <cstdio>
#include "/usr/include/gsl/gsl_matrix.h"
#include "/usr/include/gsl/gsl_sf_bessel.h"

     int main (void)
     {
       double x = 5.0;
       double y = gsl_sf_bessel_J0 (x);
       printf ("J0(%g) = %.18e\n", x, y);
       return 0;
     }
*************** OUTPUT ***************
$./prog 
J0(5) = -1.775967713143382920e-01


Hello
when I run the following code, I get the following
error. 
would appriciate some help as my first post of a
similar problem may have been lacking some info.  

thanks


***************code***************
#include <cstdio>
#include "/usr/include/gsl/gsl_matrix.h"
#include "/usr/include/gsl/gsl_sf_bessel.h"
   {
      gsl_matrix * m = gsl_matrix_alloc(6, 18);
      FILE * iF = fopen( "/home/sam/data.file", "r" );
      gsl_matrix_fread(iF, m);
      fclose(iF);
   }
***************error***************
gsl: fwrite_source.c:64: ERROR: fread failed
Default GSL error handler invoked.

Program received signal SIGABRT, Aborted.
0x404a0ee9 in raise () from /lib/tls/libc.so.6



*****************my configurations*****************
Linux debian 2.6.8 #1 Sat Aug 28 18:22:21 EST 2004
i686 GNU/Linux

installed pacakges are:
libgsl0       1.5-2   The GNU Scientific Library (GSL)
-- library package
libgsl0-dev   1.5-2   The GNU Scientific Library (GSL)
-- development package
atlas3-base    3.6.0-16       Automatically Tuned
Linear Algebra Software,
atlas3-base-de 3.6.0-16       Automatically Tuned
Linear Algebra Software,
atlas3-doc     3.6.0-16       Automatically Tuned
Linear Algebra Software,
atlas3-headers 3.6.0-16       Automatically Tuned
Linear Algebra Software,
gcc            3.3.4-2        The GNU C compiler

the exmple code in the doc. runs ok.
#include <cstdio>
#include "/usr/include/gsl/gsl_matrix.h"
#include "/usr/include/gsl/gsl_sf_bessel.h"

     int main (void)
     {
       double x = 5.0;
       double y = gsl_sf_bessel_J0 (x);
       printf ("J0(%g) = %.18e\n", x, y);
       return 0;
     }
*************** OUTPUT ***************
$./prog 
J0(5) = -1.775967713143382920e-01

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