Errors trying to save 2D array

[brunetto]

Hi againg!
I'm trying to modify your example

https://github.com/sbinet/go-hdf5/blob/master/cmd/test-go-cpxcmpd/test-go-cpxcmpd.go

to be able to save 2D arrays of float, something like

https://bitbucket.org/brunetto/c-utilities/src/cbe96e73d987/data_io.c

Everything works fine if I modify the structs to obtain a 1D array, but when I try to write a 2D array I obtain:

:: data: [0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19]
:: file [test.h5] created (id=16777216)
HDF5-DIAG: Error detected in HDF5 (1.8.4-patch1) thread 0:
#000: ../../../src/H5D.c line 171 in H5Dcreate2(): unable to create dataset
major: Dataset
minor: Unable to initialize object
#1: ../../../src/H5Dint.c line 428 in H5D_create_named(): unable to create and link to dataset
major: Dataset
minor: Unable to initialize object
#2: ../../../src/H5L.c line 1639 in H5L_link_object(): unable to create new link to object
major: Links
minor: Unable to initialize object
#3: ../../../src/H5L.c line 1862 in H5L_create_real(): can't insert link
major: Symbol table
minor: Unable to insert object
#4: ../../../src/H5Gtraverse.c line 877 in H5G_traverse(): internal path traversal failed
major: Symbol table
minor: Object not found
#5: ../../../src/H5Gtraverse.c line 703 in H5G_traverse_real(): traversal operator failed
major: Symbol table
minor: Callback failed
#6: ../../../src/H5L.c line 1685 in H5L_link_cb(): unable to create object
major: Object header
minor: Unable to initialize object
#7: ../../../src/H5O.c line 2677 in H5O_obj_create(): unable to open object
major: Object header
minor: Can't open object
#8: ../../../src/H5Doh.c line 296 in H5O_dset_create(): unable to create dataset
major: Dataset
minor: Unable to initialize object
#9: ../../../src/H5Dint.c line 1030 in H5D_create(): unable to construct layout information
major: Dataset
minor: Unable to initialize object
#10: ../../../src/H5Dcontig.c line 410 in H5D_contig_construct(): unable to retrieve number of elements in dataspace
major: Dataset
minor: Can't get value
panic: hdf5 error code=-1

goroutine 1 [running]:
main.main()
/home/brunetto/Code/gop/me/src/master_pj/test.go:53 +0x49c

goroutine 2 [syscall]:
created by runtime.main
/home/brunetto/Code/gop/go/src/pkg/runtime/proc.c:221
exit status 2

The modified source is:

package main
import (
"fmt"
"github.com/sbinet/go-hdf5/pkg/hdf5"
)
const (
FNAME string = "test.h5"
DATASET string = "ArrayOfFloat64"
LENGTHX int = 10
LENGHTY int = 2
CAPACITY int = LENGTHX*LENGHTY
RANK int = 2
)
func main() {
// Initialize array and slice
s1 := [CAPACITY] float64{}
j := float64(0)
for i:=0; i<CAPACITY; i++ {
s1[i] = j
j++
}
fmt.Printf(":: data: %v\n", s1)

// create the file
f,err := hdf5.CreateFile(FNAME, hdf5.F_ACC_TRUNC)
if err != nil {
    panic(err)
}
defer f.Close()
fmt.Printf(":: file [%s] created (id=%d)\n", FNAME, f.Id())

// create data space
dims := []int{LENGTHX, LENGHTY}
space,err := hdf5.CreateSimpleDataSpace(dims, nil)
if err != nil {
    panic(err)
}

fmt.Printf("Created space ", space)

// create the memory data type
var dtype *hdf5.DataType = hdf5.T_IEEE_F64LE// h5 type for float64 little-endian
if dtype == nil {
    panic("could not create a dtype")
}

// create the dataset
dset,err := f.CreateDataSet(DATASET, dtype, space, hdf5.P_DEFAULT)
if err != nil {
    panic(err)
}
fmt.Printf(":: dset (id=%d)\n", dset.Id())

// write data to the dataset
fmt.Printf(":: dset.Write...\n")
err = dset.Write(&s1, dtype)
if err != nil {
    panic(err)
}
fmt.Printf(":: dset.Write... [ok]\n")

// release resources
dset.Close()
f.Close()

// open the file and the dataset
f, err = hdf5.OpenFile(FNAME, hdf5.F_ACC_RDONLY)
if err != nil {
    panic(err)
}
dset,err = f.OpenDataSet(DATASET)
if err != nil {
    panic(err)
}

// read it back into a new slice
s2 := make([]float64, CAPACITY)
dset.Read(s2, dtype)

// display the fields
fmt.Printf(":: data: %v\n", s2)

// release resources
dset.Close()
f.Close()

}

I've tried to read the sources of the libraries but I can't find why it breaks or where I've done the mistake.
Also I can't fine more docs or example more than the sources or at http://go.pkgdoc.org/github.com/sbinet/go-hdf5/pkg/hdf5
to understan better how to use these libs.

Do you have any suggestion?

Thank you very much,

brunetto