I see part of the problem.

Sometimes, I do get access to the XIRR function, but, in those cases, I see
two functions

XIrr
XIRR

Ditto for someof the other functions.

So there must be conflicting Add-In libraries installed.

Where are these libraries listed in the registry.
Perhaps, I can get rid of one.

Is there an issue loading BOTH the Analysis Toolpack and the Analysis
Toolpack - VBA?