No plugin for ABC import
"ABC Import" no longer appears in my plugin list.
When I select "Plugins > Plugin Manager ..." from the menu, the list of plugins no longer includes ABC Import.
Can I restore this plugin, or is there another way to import ABC files? 
Comments
It's on the list for me, right at the top. What OS is this (a Linux variant I take it), and how did you installed MuseScore (not from the AppImage, I'm thinking)?
In reply to It's on the list for me,… by Marc Sabatella
I'm using Musescore 3.4.2 on Ubuntu 18.04.4.
I installed Musescore probably from the Ubuntu software manager, or possibly using Synaptic package manager.
In reply to I'm using Musescore 3.4.2 on… by Leon Arundell
Sure? I only see 3.2.3 in the Ubuntu PPA, and only AppImage (or Spap or Flatpak) with 3.4.2.
But only if it is missing in AppImage there's something the musescore developers can help with, the other Linux version are maintained by other people
In reply to Sure? I only see 3.2.3 in… by Jojo-Schmitz
Jojo-Schmitz I have uninstalled Musescore, and reinstalled it from the Ubuntu Software manager. My version is 3.4.2, Revision 148e43f. I still see no ABC Import plugin.
Should I report this problem to a different forum?
In reply to I have uninstalled Musescore… by Leon Arundell
If you actually look at the plugins folder with your file browser, do you see it there?
I guess it’s possible you are missing some dependencies required to run the plugin and this is somehow being detected here.
In reply to If you actually look at the… by Marc Sabatella
My Plugins folder is set to /home/leon/Documents/MuseScore3/Plugins.
The only item in that folder is "Musescore_ResetDialogPositions-2.0.zip"
In reply to My Plugins folder is set to … by Leon Arundell
That's your personal plugin folder, you need to check the one in the installation folder. Unfortunately I can't tell you where that is on your system. probably /usr/share or /usr/lib or something like that.
In reply to That's your personal plugin… by Marc Sabatella
Thanks for the tip. I found abc_import.qml in the folder snap/musescore/107/usr/share/mscore-3.4/plugins, and copied it to my personal plugin folder. It still does not appear in my list of plugins :(
In reply to Thanks for the tip. I found… by Leon Arundell
OK, that makes me think your system is lacking some dependency, then, like maybe QtQuick. I'm not an expert, but I know that can be an issue with some plugins on some systems.
In reply to OK, that makes me think your… by Marc Sabatella
Load that plugin into the plugin creator and try to run it from there, that should tell where and why it fails
In reply to Load that plugin into the… by Jojo-Schmitz
When I loaded the plugin into the Plugin Creator and tried to run it, I got the following error message:
"Creating component failed
line 22: module "QtQuick.Controls" version 1.0 is not installed."
In reply to When I loaded the plugin… by Leon Arundell
There you have it, just as Marc said, QtQuick is missing.
If this is not an AppImage, you'd need to report it to whoever put that distribution together
In reply to There you have it, just as… by Jojo-Schmitz
Is there a way that I can make QtQuick un-missing?
How can I tell whether or not this distribution is an Appimage?
In reply to Is there a way that I can… by Leon Arundell
Try
sudo apt-get install qtquickcontrols2-5-devIn reply to Try sudo apt-get install… by Jojo-Schmitz
I executed sudo apt-get install qtquickcontrols2-5-dev.
On attempting to run abc_import.qml, I still get the message:
"Creating component failed
line 22: module "QtQuick.Controls" version 1.0 is not installed." :(
In reply to I executed sudo apt-get… by Leon Arundell
Maybe it is rather
qml-module-qtquick-controls?In reply to Maybe it is rather qml… by Jojo-Schmitz
Exectting qml-module-qtquick-controls results in the following message:
"sudo: qml-module-qtquick-controls: command not found"
Thanks for your persistence. Perhaps we need to try a different approach.
In reply to Exectting qml-module-qtquick… by Leon Arundell
Of course
sudo apt-get install qml-module-qtquick-controlsIn reply to Is there a way that I can… by Leon Arundell
According to the path, it’s a “Snap”. Similar concept, but AppImage is what we support ourselves. So I recommend downloading that (see the Download / Software page in the menu above). I think it includes the necessary libraries. But really, simply installing the correct QtQuick packages should do the job even with the Snap.
In reply to According to the path, it’s… by Marc Sabatella
And I believe this issue had been reported to Snap before
In reply to According to the path, it’s… by Marc Sabatella
From the menu above, I selected "Download > Software > Download Appimage"
I then received the following message:
"You have chosen to open: Musescore-3.4.2-x86_64.Appimage ... What should FireFox do with this file?
I chose "Open with Disk Image Mounter (defauit)"
That opened a "Launch Application? dialogue box, that said:
"This link needs to be opened with an application. Send to: Choose other Application. Choose..."
When I clicked on "Choose..." it opened Files at my personal folder.
What should I do next?
In reply to From the menu above, I… by Leon Arundell
See https://musescore.org/en/handbook/3/install-linux#AppImage
In reply to See https://musescore.org/en… by Jojo-Schmitz
Thank you Jojo and Mark for your patience and perseverance.
After downloading the Appimage and following the instructions at https://musescore.org/en/handbook/3/install-linux#AppImage, I once again have a working abc_import plugin.
In reply to Thank you Jojo and Mark for… by Leon Arundell
I'm one of the maintainers of the MuseScore snap and this should be solved now. Thanks for the report and to Jojo-Schmitz for the heads up!