This problem has been there since the new windows have been implemented. No matter what update, the problem continue.
 
You add a new PO, add a Line, then click on the list button, evo crashes.  
The only way to avoid it, is to save the po, then add a line, then save the po, then click on the list button.
 
This is very impractical and annoying, because every time you save your work Evo close the PO and then you have to find it and reopen it again.
 
Are we not using the New PO Window the proper way?
 
Kelloggs

John,
 
  I just added a new PO. (tried both Evo and Classic view) then added a line item. when it was entered it put me on the REF field to enter the next line.. and the LIST Lines Icon comes up. I can press the list lines, it works no crash, and i can delete lines no problem.. all without saving the PO...
 
what is the ISTS Enhancement Date at the top of your POA screen?