Kevin,
Thank you for your response. In an earlier version of my work, I thought I had exactly what you were suggesting but I suppose my syntax wasn't quite right. In any case, I copied & pasted your sample layout code and now it no longer crashes.
However, I still do have the problem that it's not showing the 2nd column, only the first one. Here's my current code:
What am I doing wrong such that the multiple columns aren't displayed?
Robert