Hello Karthik and thank you for your attention.
Unfortunately yes that is exactly I did. I recreated from scratch and copied-paste my code.
But this should not happen. It is a big issue with the HANA Cloud Portal trial I consider and that does not drive me to buy a productive version. Neither want to advise customer to buy it. I think I lost two complete days trying to figure out these kind of issues.
Is there any possibility to manage ourselves what is going on in the server with a Productive version?
I return to debug. 
Thank you for your help Katrik, this is very appreciated.
Best regards.
Jacques-Antoine Ollier