I have created an EEGlab study (2*2) (two groups in two conditions). After completion of the study design there is no problem with the channel analysis but EEGlab interface window showing that Nb of conditions 2 (Some missing) and Nb of groups 2 (some missing).

The questions are:

Why there are missing conditions and groups in the study? Where?

I cannot per-cluster the study, its showing error msg that partial study design, you must use the study design include all dataset! How to overcome this problem?