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Can JCL and JVCL e used with 12.2 and the bcc64x compiler? If yes, how? If not, is it planned?

You could use: Label1->Caption = oss.str().c_str();

I wouldn't have written it much differently - thank you for the entry. I'm more than disappointed... 12.0 is completely useless (for me). I see it as an interim step and hope for 12.1 or 12.2. If 12.1 or 12.2 doesn't deliver, C++Builder is dead. CMake can not be used to compile VTK, OpenCV, ITK, and so on ... since ages. TwineCompile is a ray of hope - without the TC I would already be lost. The thing is, I definitely believe that they (Embacadero) are trying to advance C++Builder. I keep my fingers crossed.

The problem was - as one might suspect - a path problem. Going to "Tools->Options->Language->C++->Paths and Definitions". Then Platfrom Win64, and then under Library path all paths were created multiple times - not just the JEDI paths, so e.g. "$(BDSLIB)\win64\release" was several times in the list. This probably resulted in a string that was too long and caused the link command to fail. Sorry - I have nothing good to say about 12.0 - it's just a mess. And I am a patient person. The last few weeks have been scary. But hopefully it continues, hope dies last.

These problems have been around for a long time. Maybe you can find solutions here: https://quality.embarcadero.com/browse/RSP-29385

This is really great - one of the best news in a long time - can only be beaten by RAD Studio 11!? 🙂 I tested the archive briefly - seems to work.

I often work on two projects in two instances of the RAD Studio IDE - this works as far as I can judge, without any problems.

Thanks for the reference to graphviz - I will have a look on it. I am very satisfied with VTK, but it is very time-consuming to compile VTK with the C++Builder. Currently I am on version 7.1.1 - and it is always a pain to jump on a newer version. Using OpenCV in GetIt or via CMake would be a big step forward also for me.

I fully agree with that. The fact that open source libraries are not easy to use with RAD Studio or C++Builder is one of the biggest limitations. Installing via GetIt is nice, but much more important from my point of view is a reasonable support of CMake. I think you get young programmers at school and in the universities - there you set yourself on a "favorite IDE". Without the ability to compile open source libraries, Embarcadero is out of the race when it comes to generating young talents who use RAD Studio. What a pity! I am using VTK with RAD Studio - the only reason for that is because I am bound to the IDE with old projects. It would be cool if we put together in this thread or wherever C++ libraries that can be "somehow" compiled with RAD Studio. In cooperation with Embarcadero we should bring the open source capability forward piece by piece. PS Okay, I'm dreaming 😉

I use TwineCompile since a while and I am really happy with it. Most of the time it works quite well ... sometimes it freezes my IDE. But this is another topic ... My question here is: I am on RAD Studio 10.4.2, developing C++ projects. When I change the Build Configuration of a project e.g. from Debug to Release via the Projects Window then TwineCompile starts to compile the whole project immediately. I do not like this. I am not sure, but I think the behavior was different in 10.4.1? Can the direct compilation be disabled? I want to determine when to compile 🙂

If I'm in a large project and I'm changing something in the project options, or I'm just changing the active tab then SORTA compilation is done by default. This compilation takes a few seconds and can be annoying - it is interrupting the workflow. But it can be disabled - so, that's okay for me 🙂

I can support David's statement. Code Completion works much better now in 10.4.2, not perfect but it is definitely usable. I had similar problems in my larger projects like you, Totte, for years. Would be very interesting to find out why it still doesn't work for you. I use bcc64 - can this make a difference? PS After the last sentence I set "Target Platforms" to Win 32-bit (bcc32c) in my open project. (I never compile for 32bit usually) Then I tested Code Completion - nothing, no result after 1 or 2 minutes. Also, changing the options did not change anything. Zero respond. Then I switched back to 64-bit - Code Completion was broken there also. Zero respond. I tried everything to make it work again - nothing helped. Panic. After a reboot and "I don't know what", Code Completion works under 64bit again - I won't try 32bit again. Is this perhaps a problem with the chosen target platform after all?

I missed the Trigger options for SORTA Compile. After unchecking "Trigger when project options changes" TwineCompile behaves as i would like it.

As with 10.4.0 and 10.4.1, there may be various problems installing 10.4.2. In the old forum, which is now unfortunately offline, there was a thread in this regard. That's why I'm taking up this topic again - in order to gather proposals for solutions. There is also a bug report RSP-29385, https://quality.embarcadero.com/browse/RSP-29385 regarding these problems. Yesterday I installed 10.4.2 on two computers. On the workstation, the installation went smoothly. On my notebook (dual GPU system, 10.3.3 is there also installed) the installation failed. Reason: Missing bds.exe . Both are on the latest Windows 10 version. However by copying the bds.exe from the workstation installation to the directory \21.0\bin on the notebook I could also successfully complete the installation on the notebook.

I used the online installer. AV program is not a problem. I have my installation now running - but Embarcadero should improve the installation process. This error has been known for some time, but so far it is unclear what the trigger is. See RSP-29385. I think this is very frustrating for new users in particular.