ROOT TBrowser not working outside terminal (6.26/02, Windows 10)

[ChristianTMWeber]

Dear ROOT experts,

I have recently installed ROOT 6.26/02 for x64 via the installer on my up-to-date Windows 10 computer, which also has “Microsoft Visual Studio Community 2022 (64-bit) Version 17.3.5” installed.
ROOT appears to be generally working, but I do seem to have an issue with the RBrowser.

If I double click on a .ROOT file to inspect it a new window opens, but instead of the RBrowser it displays that “This site can’t be reached”, and “ERR_CONNECTION_REFUSED”, among others.

If on the other hand I start ROOT in the command line and open a TBrowser with

TBrowser TB

It works fine, a new window with a functional ‘ROOT RBrowser’ opens, similiar to how it did for me on other computers with older ROOT versions.

I do undestand this is a minor issue, but I do like the convinience of inspection .ROOT files so easily.
Is there a way to get the RBrowser working without having to call it explicitly from a terminal?

Best,
Christian

[bellenot]

Hi, right, I suppose the file association has to be changed for RBrowser. Thanks for reporting the issue. I’m looking into it.

[bellenot]

This is now fixed in the master branch. Note that one will need to use the Quit ROOT Session button in the browser in order to close the application.

[ChristianTMWeber]

Dear Bellenot,

thank you for the prompt response and fix!
Is the installer on the website also updated, or would I need to pull the repo and compile ROOT myself?

Best,
Christian

[bellenot]

No, the installer has not been updated, it will be part of the next release. But no need to rebuild ROOT from source, you can simply edit the %ROOTSYS%\macros\fileopen.C file and replace this line (18):

    b->GetBrowserImp()->GetMainFrame()->Connect("CloseWindow()", 0, 0, "onBrowserClose()");

by these lines:

   TBrowserImp *bi = b->GetBrowserImp(); 
   if (dynamic_cast<TRootBrowser *>(bi) || dynamic_cast<TRootBrowserLite *>(bi)) 
      bi->GetMainFrame()->Connect("CloseWindow()", 0, 0, "onBrowserClose()");

And that should work

[ChristianTMWeber]

Thank you, Bellenot!

I made the change as suggested and can confirm that this fixes the double-click-.root-file functionality.

Much appreciated!

[DJT]

I had exactly the same problem and wasted hours trying to find a solution with Google before looking for one in the ROOT question box. bellenot’s solution worked for me too. Many thanks.