How to exclude or delete a previous option selected in the Roster

[sham]

Hi Family;
I appreciate you love and your support in building some of us.

I have 2 record
1. Livestock roster
2. Crop roster
Bet before i get to the livestock roster, there is a multiple choice screener(QD1) (Which asked the respondent to select the main livestock cultivated in the passed season?
So immediately you come to the roster, you will only see the main filtered livestock that were chosen as showned.
My difficulties now is that, when i pick one livestock and run through, in coming back to select the livestock again it should exclude the previous option that i have selected and asked question about. Un till the last livestock, then you can endgroup automatically.
Same issue for the crops.
I attached the program file

Thanks
Sham

[ares]

Hi Sham,

We faced a problem with an application like yours because interviewers were cancelling products before selecting others. It will result in you loosing all skipped informations.
One thing you can do is to register product one by one in the roster (without following the order).

Let me explain.

The interviewer select: corn, potatoes, yams.
If positions are already settled in the roster, he must follow the order in which it appears. Else if position are not fixed, he will say i fill first potatoes and select potato (you will still have a variable to register the code of potato).

If after working with the 3 first crops, he meets other ones, he just select the new ones and do "go to the end" (the size of the roster registering informations on the fruits must be linked to the number of selected fruits and one fruit must not be registered twice). Then a fourth line will come for the next crop.

[sham]

Hi Ares,
Thanks for sharing your experience.
Advice well noted!!