Hello,
I was working on the Linux version, unfortunately it 'is no longer possible 
Fortunately I can use the Windows version and I installed the beta 2.9.0.4 on my small laptop.
Now, I have also installed this version on my Linux machine which has a much bigger and comfortable screen. It works through PlayOnLinux.
Good. Now, my question: Iām trying to compile but every time, whatever the trimming, I have the message: Conversion in the requested format impossible - Unknown error
What can I do?
I think itās from PlayOnLinux (implementation of Wine), because on my little laptop I do not have this problem. Has anyone come across this problem before?
Iām using WINE (staging 3.6), and I havenāt had that issue. I had an issue compiling to PDF once, but not since. (That is, I canāt reproduce it, but someone else on Windows was having the same issue consistently.)
If you can reproduce it, give steps, because thereās an issue with compile thatās causing problems for others on Windows, too.
So far, this is working for me, error-free (fingers crossed):
I have a Mac Mini dual-boot Mac OS & Linux Mint Cinnamon 18.1. Iād attach a System Info, but donāt see a way to do so.
I downloaded the latest PlayOnLinux (POL) (4.2.12) from their site. I selected the .deb for Ubuntu. I just double-clicked to install it via the debian package installer.
Per someoneās recommendation, I think on the WineHQ site, I uninstalled and purged every trace of Wine, Mono, and Scrivener (program info, not my data!). They have info on how to do thatā¦ plus I renamed the .wine āProgram Filesā folder, in case i needed 'em later. So far, I havenāt needed 'em.
I ran POL. They allow custom Wine versions, so elected to use their recommended Wine version, which is 1.6.7 as I recall. It put a generic POL Clover icon on the desktop labeled āScrivener.ā I found a nice Scrivener .png icon on this forum. It has a little Linux Penguin, so I used āpropertiesā of the desktop link to install it as the Scrivener desktop icon.
When I first ran Scrivener (double-clicking the icon), I still got the bug Iād had when I just used Wine: Iād had to keep entering my reg. code every 60 days. It kept extending my ātrialā period each time. annoying, but no big deal. Scrivenerās Astrid says they donāt support Wine, so she couldnāt help. But this time, it said āSuccessfully registered!ā Then it came up with the 59 days remaining message. However, when subsequently running Scrivener, I no longer get that nag. Yay!
Iāve edited my novel and played with a new file, So far, no problems.
After reading of your difficulty, I selected a few scenes and compiled them to a pdf. No problemā¦ and the type face looks clearer on my screen than it did when running Scrivener simply under Wine. All the type on the screen, including program messages (e.g. ācompile completedā) look clearer too.
For my text Iām using a downloaded free TrueType font called Dark Courier. Itās nicer than Courier Dark, which has intentional blocked and missing character bits which has very thin lines. I guess thatās to look more like a real typewriter. Thatās not my goal; neatness is. Dark Courier is easier to read than simple Courier, which also has very thin lines,
So,thatās my experience up to now.
Good evening,
in fact, Iām sorry but it was following a wrong maneuver on my part 
ā¦ Everything is fine on this side.
By cons I can not print directly (and this is not a problem Scrivener because even with Wordpad I have the same behavior: we do not see anything in the preview before printing, and the impression gives white fevers ā¦)