Tomatoes Rotting on the Vine?

The plants are fine and so are the tomatoes when they are green. The problem is while they are ripening on the vine they begin to rot. It is not blossom end rot because that is not where the rotting is. They develop spots and begin to rot on the vine. I used calcium in the spring and Miracle Gro and the plants and early tomatoes (green) were beautiful, but when they started to ripen that is when they rotted. What could be the problem? Thank you for your help.

By Wayne B