Set a UD field from an unrelated UD Table

[Banderson (Brandon Anderson)]

Try this.

foreach (var tt in ttUD08.Where(tt => tt.Updated() || tt.Added()))
{
  var JobHead = (from jh in Db.JobHead.With(LockHint.UpdLock) where jh.Company == tt.Company && jh.Character01 == tt.Key1 select jh).ToList();
  
  foreach (var x in JobHead)
  {
    if(x!=null)
    {
        x.SetUDField<System.Boolean>("CheckBox05", tt.CheckBox01); 
        Db.Validate();
    }
  }

}