My first attempt at coding - I got stuck at CADF folder

[FinallyRetired]

After purchasing the necessary parts to attempt coding, I tried to open the CADF folder associated with the BKOMBI Module - I am trying to modify the my i3 tank capacity. As I expand the folder then click on "EDIT FDL", I get a message "NO EST FILE CHOSEN C155".
My config is a Windows 7 laptop, ESYS 3.27.1, PSdZDATA 59.0 and ESYS Launcher Premium 2.4.3 with Token Generator. I am using the STEP-BY-STEP CODING tutorial / Guide with Screenshots found at http://www.bmweye.com/guides/Beginners%20Guide%20Coding.pdf

I am close but "no cigar" - obviously, I have missed a step or failed to do something proper.

I would welcome any recommendations.

Thanks,

 

[gt1]

A dealer updated my car's software and some of the modules became inaccessible. Updating psdztdata to 59.2 solved the problem.