[Libreoffice-bugs] [Bug 44497] Extension CorePolyGUI causes Calc to crash when clicked on via Addons menu OSX

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=44497

--- Comment #32 from Rob Lewis <rob51 at mac.com> ---
I'm having no luck installing the standalone version on macOS 10.13.6. Here are
my exact steps: 

1) Download CorelPolyGUI_1-4-5_standalone.zip and unarchive it

2) In the resulting CorelPolyGUI_1-4-5_standalone folder double-click the
CorelPolyGUIOffice.jar file

3) The jar launcher tries to open it but shortly produces the message "The Java
JAR file "CorelPolyGUIOffice.jar" could not be launched". I'm advised to check
the Java console for possible error messages but so far I haven't found a way
to display the console (In the Java Control Panel, I have checked the "Show
Console" option but have never seen it appear).

When I try to launch the file in Terminal with: 
java -jar
/Users/uname/Downloads/CorelPolyGUI_1-4-5_standalone/CorelPolyGUIOffice.jar 

I get the message: 
no main manifest attribute, in
/Users/uname/Downloads/CorelPolyGUI_1-4-5_standalone/CorelPolyGUIOffice.jar

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