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As this reason "because 256 = 4*64 (where 4 refers to the number of attribute levels) such that the near-orthogonal design with 256 rows will have the same sequence characteristics as the 64 row design"
but why 128=2*64 doesn't have the same characteristics as the 64 row design?

So again. Don’t you ...

Dear Michiel:

Don’t you think the “seq” syntax which results in “3,3,-3,-3,3 etc.” or “1,1,1,-1,-1,-1 etc” combination is not reasonable?
This combination directly leads to the failing of dummy/effect coding estimation.

Dear: i checkked again with your coding.

1. I noticed that, you change the "seq" to "sim" in your updated coding. i tested that before, in the "sim", there will be random combination between levels, but there may be same alternatives within one chice set. so we then used "seq" which has the ...

Thanks for your reply. Based on your words, do you mean I need to announce which attribute's levels which I want to estimate later as dummy or effect? Otherwise, i can not estimate the dummy?

My doubts now are as follows:
1. Based on your technical explanation, i think my design now at least can ...

Dear Michiel:
Thanks for your reply.
I have already E-mailed you with very detailed materials about my problem. Please check the E-mail.
Hope we can work out a.s.a.p.

Dear Ngene team:

I am a user from Eindhoven University of Technology. I may report a fatal error in Ngene unlabeled orthogonal design. I hope your team can detect it and reply.

The occasion is like this:
1. I used Ngene “seq” command to form a 12 four-level and 3 two-level unlabeled design ...