[PLUG] fail safe programming question

[website reader]

Has anyone had expeience with C++ and writing fail-safe code?  My naive
approach is to copy object values to a folder on the hard drive, so that if
the program crashes, I can have key values saved.

However, I am finding upon bringup, that naively creating the C++ objects
all over again is wiping the crucial saved data.

I am curious if anyone has done this type of coding?

I would like to get in touch.  Thanks

Randall