I tried with a php.ini f?le and setting the
display_errrors = Off (I could not find any warnings on/off) . It didn't work but as said I probably had made some stupid error - as I have never tried such thing before...
But anyway.... I found the solution to the before mentioned errors/warnings

And the solution - simply make
at least one entry for each user field..... Thats all...
But may be the script could take into account that zero entries actually is a possibility?