If you want to view or modify variable values during debugging, the program unit must be compiled with debug information. There are 2 ways to accomplish this:<OL TYPE=1>
[*] Enable the Debugger preference "Add debug information when compiling" (Tools > Preferences > Debugger tab page). Now you don't have to worry about debug information anymore, as each compilation implicitly adds it.

[*] Right-click on the program unit in the Object Browser and select "Add debug information".</OL>The debug information goes away if you compile it without the "Add debug information when compiling" preference, or when someone else compiles it without debug info.