Section type error in powerscheduler

[sponte]

As in the past, I am using section types to schedule special ed students into substantially separate programs.   These are the only students that will load.  All of my other students get the  Data Error Student xxxxxxx, xxxxxx (xxxxx) is incompatible with the primary or an alternate on request for course 7030 with section type  (null).  This happening on all course that have "use section types checked".  Looking for suggestions.

[Reshma]

Hi @sponte,

Can we please confirm if this is due to Student Free Constraints? For example, if a student already has a class for the 1st period and they have requested another course that is available 1st period only.   This could create an error.