Hi, This message is more a call for sharing experience than a real question about a specific extension development problem.
I have developed a free extension (in Java) called Oblivion and which is referenced on extensions.openoffice.org, and one of my users has reported a problem that nobody else has ever met. More precisely, Oblivion consists of a dialog box that lists previously opened files. A menu entry with one subitem is added to the environment. The dialog box can also be opened using an accelerator (shortcut key). However, for this user, the menu item is grayed out, which means that the extension did not initialize correctly. As a tentative fix, I have added logging capacity to the extension but logging that the initialization succeeded or failed can only happen after the extension has been instantiated by OpenOffice, which does not happen. The same user installed the extension on another computer of his and it works just fine. Both of his computers run Windows 10 and a version of OpenOffice (the latest to date) with which my extension is compatible. His Java installations are identical and I made him install the latest JRE, which is correctly identified in the Tools - Options dialog. I'm out of ideas for possible causes for this problem. In case someone has ever had to deal with a similar problem, your sharing of your experience may point me to the right direction. Thank you.