Select outer nodes on cylinder

Hello,
im doing Modal Analysis of a stator (which is basically a cylinder) in Hypermesh. The model has around 700000 nodes. The analysis results are output in a pch file. The problem is this file gets really big when i consider multiple modes. I need to import this file in matlab to do some further calculations. So I would like to reduce this file, because I only need the results at the outer nodes anyway. I know which settings to use, but my simple problem is to select the outer nodes. Im looking for something like "selection by cylinder", where I can say everything beyond r=100 mm should be considered. I know there is something like that in the tcl scripting (hm_createmark nodes ....), but there I get the message "In scripts, only the last 100 entities may be retrieved directly". I also tried selection "by face". (I assume) It is not working because my model is an imported solver deck an there are only nodes and elements in my geometry, I cant select any face.