Getting a "List Index Out Of Bounds (9)" error when I try to remove a file from a project...?

I'm using Borland CodeGear C++ Builder 2007. I've created a fairly complicated project that includes such features as database access, as well as the heavy use of classes and libraries.

I apparently have some sort of a library synching issue because, when the statements:

double xx = 0.0;

xx = Pln.Nrd.retireAge;

are executed, xx is 65 and Pln.Nrd.retireAge is 0. I don't understand how this is possible-- it's a direct assignment, after all!-- unless it's a problem with the library I'm using.

In a separate (related?) issue, I have some files included in the project: report.cpp, plan.cpp, and getp.cpp. When I try to remove them, however, a dialog box immediately pops up saying, respectively:

List index out of bounds (8),

List index out of bounds (9),

and List index out of bounds (7)

I also can't "Save All", because the list index out of bounds error pops up and prevents these files from saving.

Any thoughts or suggestions would be appreciated.