toggle watchpoint grayed out

[lpcware]

Content originally posted in LPCWare by mspahr on Tue Oct 08 11:05:47 MST 2013
I am running LPCXpresso 5.2.6
LPC11u37
Debug perspective
I highlight a global variable in the editor.
RUN->Toggle Watchpoint is grayed out.
How do I enable it?