I have a drop down list box.

RowSourceType = 5-Array
RowSource=ThisForm.r_aListAray

I use a query in a form method to regenerate the array as needed,
then the list object uses For loop and AddItem in m_init method to populate.

On queries of 150 and less, the list will open.
On queries greater than this, the list does not open.
I can use the arrow keys to navigate if I do not attempt to open the list.

Any ideas on what is going on here?