Here is a manual of how to read F series I-Step from VCM master, using BMW E-sys software.
The I-Level (aka I-Step) is the Integration Level of your car, which represents a package of firmwares for all your modules, and it corresponds to the version of ISTA/P last used to program your vehicle.
To determine your I-Level, go to VCM Module => VCM Master Tab => click Read under I-Steps:
The I-Step (current) is the one you want to match when you select the CAFD from the Detect CAF for SWE options (e.g. F001-08-09-550):
When you lost power in the middle of FDL Coding your CAFD, it became corrupted. What I am having you do is insert the same CAFD in it's default generic state and then coding it based on your specific Vehicle Order (Production Date and Option Codes) so in the end you will have exactly what you started with before the power failure and CAFD corruption.
As I have repeatedly stated, so long as one isn't coding the DME module, you should code with the engine running, and will you never have to worry about loosing vehicle power mid-coding, unless of course you run out of gas.