Thank you Stephane, for your offer to help. Hopefully I could solve that problem right now. I deleted all the survey and rebuilt it again, so the issue disappeared. Bit now I have another issue with another survey. If you can help in it, I will greatly thankful.
After I finished this survey lastly, when I try to make preview, it does not open the preview window at all and I get the following message:
“seed value must be a number or a reference to another field.”
Though all seed’s spaces of all the questions is empty as default. Do you have an idea about the issue?
Thank you again for offering help