Problem with glBindTexture

[FrankE]

I've loaded a image using:

image = new QImage(QString("d:\\temp.jpg"));

and also I generated a OpenGL texture with:

GLFunctions::gl30()->glGenTextures(1, &texHandle);
GLFunctions::gl30()->glBindTexture(GL_TEXTURE_2D, texHandle);
GLFunctions::gl30()->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image->width(), image->height(), 0, GL_BGRA, GL_UNSIGNED_BYTE, image->mirrored().bits());

Where GLFunctions::gl30() is a function that returns QOpenGLFunctions_3_0 of the current context.
binding it to a shader doesn't work or it is not sent to the shader

GLFunctions::gl30()->glBindTexture(GL_TEXTURE_2D, texHandle);

In the other hand using QOpenGLTexture, it works ok

tex = new QOpenGLTexture(image->mirrored());
tex->bind();

So the shader workflow is correct.
Also I know that the texHandlle is ok since I can make:

//TRY TO READ THE TEXTURE TO CHECK IF IT IS VALID
float *landArray=(float*) malloc (image->width()*image->height()*3*sizeof(float));
GLFunctions::gl30()->glGetTexImage(GL_TEXTURE_2D,0,GL_RGB,GL_FLOAT,landArray );
int off=(floor(0.5*image->height())*image->width())*3;
off+=floor(0.5*image->width())*3;
float res[3];
res[0]=landArray[off];
res[1]=landArray[off+1];
res[2]=landArray[off+2];
qDebug()<<"GL buffer contains color "<<res[0]<<res[1]<<res[2];

And it dumps correct values.

Any tips on this? Thank you in advance

[FrankE]

That's becoming even more weird:

GLFunctions::gl30()->glGenTextures(1, &texHandle);

returns 2 in texHandle.

but for using it in the shader it works for a value of 1 in the bindTexture

GLFunctions::gl30()->glBindTexture(GL_TEXTURE_2D, texHandle-1); 

This is driving me nuts.