Thanks Martijn, at least you have taken interest in my problem!
I thing the second solution (by you) is towards the answer, as I understand.
As per your advice these steps can be taken :
1. I should write a special logfile, starting with a no 1.
2. Will you please tell me how to increment, which plugin, the same data everytime, after only a successful call?
If this idea works, I get the solution. Can you append anything towards the solution? Expecting reply...