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RAD Studio 12.3 May Patch

RAD Studio 12.3 May Patch

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Today Embarcadero released a second patch for RAD Studio, Delphi, and C++Builder 12.3 Athens.

The RAD Studio 12.3 May Patch is a cumulative patch which provides quality improvements to the 12.3 release, including the fixes already in the RAD Studio 12.3 April Patch, plus a few files missing from the April Patch, and a couple of additional fixes.

Outside of the missing files, this patch addresses:

If you have already installed the April Patch, you can install the May Patch on top of it (as you can see in the About box below, after installation). If you haven’t installed the April Patch, you can just install the May patch, which includes everything (in that case the About box will only list the May patch). As part of releasing the May patch, we have retired the April patch.

This patch is about 650MB to download. Installing this patch is highly recommended for all RAD Studio 12.3, Delphi 12.3, and C++Builder 12.3 customers.

Patch Installation Process

GetIt-based installation steps for this deferred package are very similar to what already described in the past (see for example https://blogs.embarcadero.com/rad-studio-11-alexandria-patch-1-available/):

  • The patch availability is indicated in the Welcome page of the IDE
  • As an alternative, search for it in the GetIt Package Manager
  • Once you start the installation, it asks you to accept the patch EULA (which is the same of the product EULA) and it reminds you that you need to restart the IDE
  • As the actual process starts, it opens a console. Remember you might have to accept the UAC system prompt to proceed, even if it might sit behind the console window. The entire installation process takes place outside of the IDE, in a command line console.
  • Once the process is completed, the RAD Studio IDE should restart automatically

A couple of additional notices:

  • You have the ability to dismiss the patch and not be reminded about it in the Welcome Page any more, without installing it.
  • If you install the patch via GetIt, the About Box in the IDE will indicate the patch has been installed.

In case you download the patch ZIP file from the my.embarcadero.com portal (where it will be available shortly), you’ll have to install it manually, following similar steps of the automated install: the details are in the readme file included in the installation. You need to manually close the RAD Studio IDE before you install the patch (you’ll see an error if the IDE is running). Also, keep in mind that in case of a manual installation, the about box won’t reflect the patch status.

RAD Studio 12.3 May Patch Readme

May 19th, 2025

The RAD Studio 12.3 May Patch is a cumulative patch which provides quality improvements to the 12.3 release, including the fixes already in the RAD Studio 12.3 April Patch, plus a few files missing from the April patch, and a fix for an issue with the Win64 debug expression evaluator after applying the April patch, reported at https://embt.atlassian.net/servicedesk/customer/portal/1/RSS-3416, plus an issue with version information in the 64-bit IDE, reported at https://embt.atlassian.net/servicedesk/customer/portal/1/RSS-3173.

Installing this patch is highly recommended for all RAD Studio 12.3, Delphi 12.3, and C++Builder 12.3 customers. This cumulative patch is approximately 600MB in size.

Below is the readme of the April Patch this May Patch adds to. The installation steps remain the same.

RAD Studio 12.3 April Patch Readme

April 22, 2025

RAD Studio 12.3 April Patch provides quality improvements to the 12.3 release, focused on the Delphi compiler, the C++ 64-bit Modern toolchain, the RAD Studio 64-bit IDE and its debugger, the VCL library and other RAD Studio features.

Installing this patch is highly recommended for all RAD Studio 12.3, Delphi 12.3, and C++Builder 12.3 customers.

Installation via GetIt

If you download the patch via GetIt, it is installed automatically, creating a backup of the files replaced. The download, about 162MB, happens in one of the steps of the console window (this may take some time depending on your connection speed).

Note: The patch includes an updated version of PAServer. This is copied to the patch download folder, and you need to copy it over to your target devices (Mac, Linux, Windows) and install it manually there.

In addition, for debugging packages in the 64-bit IDE, you should set the LLDB_DCP_SEARCH_PATH environment variable to refer to the libwin64debug folder, with a command like:

set LLDB_DCP_SEARCH_PATH=C:\Program Files (x86)\Embarcadero\Studio\23.0lib\win64\debug

And then run bin64bds.exe from the same command line.

Manual Download and Installation

This patch is also available in the download portal at my.embarcadero.com. Locate the  RAD Studio 12.3 April Patch file and download it. After unzipping it, you can run the batch file or you can manually expand the embedded ZIP file in the respective subfolders of the RAD Studio installation folder.

You’ll have to copy PAServer and install it on your target device and set the LLDB_DCP_SEARCH_PATH environment variable as explained above.

Uninstallation steps (for GetIt installation)

To uninstall the patch and revert back to the 12.3 original version:

Open the Catalog Repository installation folder

Run patch.R123.hotfix.april_uninstall.bat

Only *after* you have cleared the patch, uninstall the package from GetIt

Quality Portal issues and other issues addressed by the RAD Studio 12.3 April Patch

Delphi Compiler and Toolchain

This patch addresses a compiler speed issue along with a change in the use of the record constraints for generic types:

https://embt.atlassian.net/servicedesk/customer/portal/1/RSS-3163

https://embt.atlassian.net/servicedesk/customer/portal/1/RSS-3102

https://embt.atlassian.net/servicedesk/customer/portal/1/RSS-3309

Modern C++ 64-bit Compiler and Toolchain

The patch contains a variety of quality fixes in several areas overall.

The patch addresses the following publicly reported issues:

https://embt.atlassian.net/servicedesk/customer/portal/1/RSS-3056

https://embt.atlassian.net/servicedesk/customer/portal/1/RSS-2708 

64-bit RAD Studio IDE

For the 64-bit RAD Studio IDE we added support for ExpertsCreators, addressed an issue running on a Windows ARM VM in Parallels Desktop, and included many improvements to debugging 64-bit Delphi apps in the 64-bit IDE overall.

The patch also addresses the following publicly reported issues related to key bindings:

https://embt.atlassian.net/servicedesk/customer/portal/1/RSS-3169

Additional Reports

The patch addresses the following publicly reported issues for Android services and VCL styles, and an issue when creating Delphi ActiveX libraries:

https://embt.atlassian.net/servicedesk/customer/portal/1/RSS-3108 

https://embt.atlassian.net/servicedesk/customer/portal/1/RSS-3149 

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