How to get TI to do a missed differential backup instead of starting over?
Hello, I have True Image 2017. I do a full backup followed by 6 differential backups followed by a full backup. The backups occur once a week. Every once in a while, for various reasons that are not the program's fault, TI2017 cannot reach the drive it is supposed to back up onto, and the backup fails. A red "x" appears to note this if you open the main interface.
When this happens and I discover it, I would like to fix the problem and then perform the missed differential backup. But I can't figure out how to make it do a differential backup. Invariably, on the next backup after a fail, it starts over and does a full backup. This happens if I manually say "back up now". It also happens if I just wait until next week. It also happens if I change the schedule so that the next backup is, say, an hour from now. No matter what I say or do, if I do nothing or I do something, TI's response is the same: Start Over From A Full Backup Again. This despite the fact that right now the banner at the top says "Last backup 4/13/2020" which is correct. It says Next backup 4/27/2020" which is correct.
Even more peculiar, this particular time I have a new problem: I actually have two backups set to go, one after the other. Usually in this situation I will end up with 2 red x's. In this case, the backup that has the red x is the second one. But the first one didn't happen either. This first one, however. has: a) a green checkmark as if it happened; b) a banner that says its last backup is 2/11/2019 which is absolutely not true. Its last differential backup was 4/13/2020 and its last full backup was 3/23/2020. So this time was "extra special".
So my most critical question is, is there any way to have TI start from "where it left off" after something goes wrong, in the "usual" case where it missed a backup and is accurately reporting this to me?
And secondarily, what if it missed a backup and now thinks its last backup was very different from when its last backup actually is, what's up with that and how do I get it to know what's actually gone on?