How to Install IBM Access Client Solutions (ACS)


Jul 29

IBM-i ACS is JAVA based, so it can be installed on Windows, MAC & Linux devices. The legacy IBM Client Access is no longer supported. IBM Client Access & ACS can both be installed on the same PC and live quite happily next to each other.

So what are you waiting for?

Standalone install

By far the easiest way to use IBM i ACS is to simply unzip it to a folder of your choice and then run the ACSBUNDLE jar file:

double click ACSBUNDLE and launch IBM i ACS immediately

I really like this standalone technique because its easy to roll out to other users and even easier to update – simply copy the new version over the top.

Having said that, IBM recommend a full install because it adds shortcuts and also copies the files to IBM’s preferred locations in your PC.

So, if you really want to be a good boy/girl then follow these instructions:

Full Install


  • Installation requires Administrative rights on the target.
  • The target PC or Server must have JAVA installed. ACS is compatible with the newest versions. Do not install ACS without first installing JAVA. Get it from
  • Spend a few minutes reading the QuickStart Guide before installing IBM-i ACS to gain a proper understanding. You can find the guide in the folder referred to in step 1) below.

Installation Instructions

Unzipped ACS files for IBM I Access Client Solutions Installation folder to your Desktop :

Choose your platform and goto the install folder for that – ie: either LINUX, MAC or WINDOWS. In my case, I will install the 64-bit version by double-clicking on install_acs_64.js in the Windows_Application folder:

Install Prompts

Now you are going to answer a series of questions. If you have your firewall popping up asking “wtf?” simply grant it access:

First question is whether you want to use the good old fashioned green screen emulator

Answer Yes to using 5250 emulation

Select it to be defaults, because, why not?

If your PC already has the conventional IBM Client Access installed, ACS requests becoming the default client. Personally, I would recommend ACS is the default.

Ps: the new IBM i ACS handling of IFS is super simple and slick as FTP

NOTE: my install told me JAVA wasnt installed. This is a big fat lie. Ignore it.

IBM i ACS is installed

Once its installed you can open Access Client :

Want to watch a real time install of some mumbling English bloke installing ACS on his home machine?


UPDATE from Subscriber 🙂

Hi, Nick.I’m a lurker and enjoy your posts. Actually I’m an mid-aged IBMi developer in Maine who loves learning and applying what I learn. AND I’m big on the newest release of ACS, so much good stuff!!

So, just a quick contention point about your recent post about How To Install ACS. Something I learned this recently and wanted to pass this: You do not need Java installed on the destination workstation.

What ACS needs is a compatible jdk/jre located in the start up folder, not the full-blown Java install. The jdk/jre isn’t even installed, it’s just present.I’ve downloaded the latest IBM jdk/jre (jdk-12.0.1+12-jre) from

You select the version you want, download it, and simply copy the folder to the ACS start folder (typically C:UsersUserNameIBMClientSolutionsStart_ProgramsWindows_x86-64 . If you copy the folder to the .. install folder before actually installing ACS, the installer copies the folder to the runtime start up folder during the installation process for.

Oracle changed their licensing cost model for business use of Java, but IBM is championing the free Java and has committed to releasing updates, et al.

[prefer to remain anonymous]


About the Author

IBM i Software Developer, Digital Dad, AS400 Anarchist, RPG Modernizer, Alpha Nerd and Passionate Eater of Cheese and Biscuits. Nick Litten Dot Com is a mixture of blog posts that can be sometimes serious, frequently playful and probably down-right pointless all in the space of a day. Enjoy your stay, feel free to comment and in the words of the most interesting man in the world: Stay thirsty my friend.