Export misses variables

I am using V3.32(W11 Pro 64bit) and am trying to process and create some statistics on a discography(or any bundle of related MP3s). It was my understanding that one could use any of the variables that appear as column headers in the main interface to produce reports. These normally would include: filename, path, album, track, discnumber, length, bpm, bitrate, plus some more. When attempting a simple .txt export (there is a pre-defined template included with the software). It shows as:

$filename(txt,utf-8)$loop(%\_path%)%artist% - %album% - %track% - %title% - %year% - %genre% - %discnumber% - %bitrate% - %bpm% $loopend()

This works functionally, but several of the variables appear as spaces where the interface window shows data. Thinking this issue might be case related, I tried BPM and Bpm as well, with the same result.

Here are a few lines from Uriah Heep using the template above:

Uriah Heep - ...Very 'eavy ...Very 'umble - 1 - Gypsy - 1970 - - - -
Uriah Heep - ...Very 'eavy ...Very 'umble - 2 - Walking In Your Shadow - 1970 - - - -
Uriah Heep - ...Very 'eavy ...Very 'umble - 3 - Come Away Melinda - 1970 - - - -

You will notice that everything beyond &year& appears as blank, even though the data exists; in this example, %genre% - %discnumber% - %bitrate% - %bpm%

How can I get the all those included in the report?

Regards

at least this one should be called %_bitrate%
For all the others it would be helpful if you could show us a screenshot of the extended tags dialogue of a single file.

Is the script excerpt the genuine script text or something that you typed in?