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ARC 2026.04.14.01 (Pro, Runtime And Free)

Desktop — Windows

ARC Release

ARC (Autonomous Robot Control) is Synthiam's flagship desktop robot programming platform. Build, program, and control any robot with powerful AI, 500+ plugins, and a visual no-code interface — all from your PC.

🤖 500+ Robot Plugins
🧠 AI & Machine Learning
☁️ Synthiam Cloud
🖥️ Windows 10 or 11

Change Release Notes

This update is one of those "you don’t realize how much better things feel until everything just works" releases. Packed with stability fixes, smarter behavior, and quality-of-life upgrades across the board, ARC just got a whole lot more reliable (and a bit more clever too).

User-inserted image


Smarter Controls & Input Handling

  • Joystick robot skill is now way more resilient

    • Proper disconnect/reconnect detection with clean logging
    • No more deadlocks - the loop always resets correctly
    • Improved bounds checking (no more weird early exits)

Audio Gets an Upgrade

  • Adjust EZB audio volume live during playback

  • Volume now safely clamps (no more zero-volume weirdness)

  • Soundboard:

    • Toggle whether scripts run during playback directly from the UI
  • Bing Speech Recognition:

    • Added pre-buffer audio recording option in config menu
    • Capture audio before the trigger fires (great for VAD wake-word scenarios)

Smarter Error Handling (and way better debugging)

  • ControlCommand system now gives detailed, actionable errors:

    • Detects duplicate robot skills
    • Shows robot skill type
    • Points you to the manual when syntax is wrong
  • Improved exception handling across UI events

  • Speech recognition:

    • Gracefully handles systems with no recognizers installed
    • Less errors in logs - just clean fallback behavior

Camera & Vision Stability

  • Fixed rare error in Camera Training popup

    • Safe handling of UI/thread timing race conditions
  • Quietly ignores harmless disposal timing issues while still logging real errors


UI & WinForms Stability Fixes

  • Fixed a nasty font autoscale error when dynamically adding controls
  • Improved theme consistency when generating UI elements
  • Eliminated PictureBox error caused by GDI+ edge cases
  • General UI event handling is now more robust and fault-tolerant

Memory & Resource Fixes (Big Ones)

  • Fixed GDI+ bitmap handle leak

    • Prevented eventual "out of memory" errors after long sessions
  • Optimized large 3D model loading:

    • Dramatically reduced memory spikes
    • Eliminated errors when parsing large XAML meshes

Connectivity & Device Behavior

  • Joystick device driver now:

    • Logs disconnect once (no spam)
    • Recovers cleanly on reconnect
  • EZB audio improvements ensure smoother runtime control


General Improvements

  • More consistent disposal patterns (no lingering event handlers)
  • Better internal logging across multiple subsystems
  • Numerous behind-the-scenes fixes that improve long-term stability

The Big Picture

This release focuses heavily on real-world reliability:

  • Fewer errors logged
  • Better recovery from edge cases
  • More useful debugging info when something does go wrong

In short: ARC is now tougher, smarter, and more predictable - exactly what you want when building serious robots.


If you’ve ever had something "just randomly break" this update is for you.


ARC Downloads

ARC

FREE
$0 always free
  • 1 third-party plugin skill per project
  • Trial cloud services
  • Personal, DIY & education use
  • Updated every 6–12 months
Recommended

ARC

PRO
$8.99 per month
  • Use on 2+ PCs simultaneously
  • Unlimited robot skills
  • Cloud backup & revision history
  • Weekly features & bug fixes
  • Business use permitted

ARC

RUNTIME
$0 always free
  • Load & run any ARC project
  • Read-only mode
  • Unlimited robot skills
  • Includes early access fixes & features
  • Minimum requirements: Windows 10 or higher, 2 GB RAM, 500 MB free disk space.
  • Recommended: Windows 10 or higher, 8 GB RAM, 1 GB free disk space.
  • Prices are in USD.
  • More about each edition: Download & install guide.
  • Latest changes: Release notes.

Compare Editions

Feature
ARC
FREE
ARC
PRO
Get ARC Free View Plans
Usage Personal · DIY · Education Personal · DIY · Education · Business
Early access to new features & fixes
Simultaneous microcontroller connections * 1 255
Robot skills * 20 Unlimited
Skill Store plugins * 1 Unlimited
Cognitive services usage ** 10 / day 6,000 / day
Auto-positions gait actions * 40 Unlimited
Speech recognition phrases * 10 Unlimited
Camera devices * 1 Unlimited
Vision resolution max 320×240 Unlimited
Interface builder * 2 Unlimited
Cloud project size 128 MB
Cloud project revision history
Create Exosphere requests 50 / month
Exosphere API access Contact Us
Volume license discounts Contact Us
Get ARC Free View Plans

* Per robot project

** 1,000 per cognitive type: vision recognition, speech recognition, face detection, sentiment, text recognition, emotion detection, azure text to speech


ARC Pro

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Author Avatar
PRO
USA
#1  

I notice that when I start Synthiam/ARC it asks me if I want to upgrade to the latest version which is 2026.04.16.01, but I don't see any release notes for that version, the last set of release notes are dated 2026.04.14.01(this one). Is 2026.04.16.01 a valid release? Just haven't seen the team release a new version without notes.

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PRO
Synthiam
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#2   — Edited

Looking at the internal notes, it was a minor update that fixed an installer issue and has no significant changes.

#3  

LOL! I was wondering the same thing. Thanks for the explanation. @dbeard beat me to asking the question.

Nice updated! I love it when one is released. Thanks again!!!:D

#4   — Edited

Yesterday I had (ARC 2026.03.23.00) and when prompted I let the ARC app upgrade to this version (it showed it was going to upgrade to ARC 2026.04.14.01) and once the upgrade and installation was complete, I encountered an error that did not let the app open and run correctly.  The error was  (Could not load file or assembly 'CefSharp.Core.Runtime.dll' or one of its dependencies. The specified module could not be found.) And a reboot did not fix the error.

I solve it by manually downloading ARC Pro 2026.04.16.01 and selecting "repair" when running the installation.  After that ARC ran as expected.

I'm not sure why my ARC 2026.03.23.00 thought ARC 2026.04.14.01 was the latest when ARC 2026.04.16.01 was already out yesterday on 4.28.2026.

Author Avatar
PRO
Synthiam
LinkedIn Thingiverse Twitter YouTube GitHub
#5  

Oooh boy sounds like a corrupted download, maybe. Or windows just messed up the installation haha. Over the years I’ve seen windows do some weird stuff. But lately with all these broken updates, it’s been a nightmare. Haha