VEXcode IQ Blocks - Download error

I’m working with IQ Blocks on my laptop (Windows 10) since several days without any issues.
After installing the same version on desktop computers (also Windows 10) in the school lab we are not able to download the programms to the brain. After connecting brain via USB the brain is shown “connected” in in the software and we even can start exesting programms on the brain via the software-play-button. But when trying to download we receive the message “an error occured, please try again”.
Same programm on the laptop with same brain and same USB cable can be downloaded without any problems.
Do you have any idea how to solve this?
We would like to use the software as soon as possible in a programming class…
Many thanks for your help!

No answers in 3 days so I will try.

Can you see the brains with the latest VEXos Utility on both laptop and desktop?

Also best to run only one software at a time, so quit one (and any other related software) to run the other.

Make sure latest versions. Blocks is here.

Try another USB port? Not using USB hub? Any other USB devices attached?

Try downloading to a freshly updated brain?
Two ways (from memory),

  1. rightclick brain icon in VEXos Utility, do “Force Update”,
  2. DFU mode - the 4th FAQ here. Must restart brain and sometimes Utility too.

Still problems?

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We get a similar problem. Code will download a few times just fine. Then this error starts.

We are on the latest windows 10 using Lenovo flex hardware. Latest firmware is on the brain.

We tried combinations of brain restarts, changing ports, code blocks restarts, and USB port changes. We did not have to go as far as a to Dfu a brain.

Right now our workaround is saving the program and restarting code blocks. That seems to work even though it is time consuming. If we can find a faster workaround this weekend we will post it.

If someone is monitoring this thread please reach directly out to me. I think we can help with this bug and long term.

We have 300 students in vexiq and we were an alpha site for modkit in direct communication with the developer lead. We have professional devs on staff that know how to give a complete bug report. We are also comfortable running debug or early versions of software.

PM me your email address and we’ll get someone from the dev team to reach out.

One other thing to note - We have identified an issue with new firmware updates / new brains that the IQ Catalog may report incorrect data and the IQ brain will lock up (become unresponsive to button presses). This can be resolved by using “Settings” -> “Erase User Programs” as a work around as we work on a permanent fix. Users should only have to erase user programs once to resolve the issue.


Many thanks for your replies!
We’ll try solving the issue by one of these ways.
I will respond afterwards…

I am having the exact problem. Any solutions that you found Stefan?

We could not solve the problem yet but we think to know the reason: on the PCs Windows is running on a Linux system so the USB ports are not directly connected from hardware to Windows, but somehow ported through the Linux system (I hope this is somehow understandable - I’m no IT specialist and struggling a little with my English vocabulary…)
Our workaround for this problem is a separate Download-PC which is available for every student. Programms will be transferred by USB stick, later via a central transfer folder.
Thanks again for your support!

Yes, always good to mention exactly what hardware, OS, and other software involved when asking for this kind of help. There is probably a way to use serial ports through Linux.

What computer are you using?

How are you running Windows? Wine, KVM, or some other VM?

With info like that I’m sure someone has the answer. And someone else might read this and benefit.

Glad you have a workaround.

Just out of curiosity, are you running the program from an admin account or standard user accounts. We are having a problem in one of our labs with the same/similar issue, but only from a limited user account. I have gone in and manually changed the program folder permissions to “Full Contol”, but it will still not work under the non-admin account. It acts as if it is going to download, but then just stops. Under an admin account there is no issue. Is there anything else that might require “modify” rights or are you running this with a standard user account. I think there may be a group policy issue, but our Enterprise Support Group says there is no policy that should interfere. Anyway, thanks in advance.

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Hello robotguys

We are having the same exact problem. Seeing that this was posted a month ago, have you found the solution to this problem?
If so, please let us know

Add us to the same problem. Using VEXcode V5 Blocks (all up to date for software and firmware). Sometimes it downloads, but once is starts throwing the error, getting it to download again is very sporadic. Restart sometimes solves it, other times not. Very annoying. Would like some further direction/support from Vex on this.

We’re happy to look into any issue - you can either post your project here, or send feedback via the Feedback Tool inside of the application. The fact that the issue is sporadic makes it seem like it may be a project issue.

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We are having the same problem with latest VEXcode IQ Blocks running on a laptop with Windows 8.1. We tried a very simple program with just a move forward and then a turn right command and it fails to download with the “Your program failed to download. Please try again.” message. Is there any way to get more detail on the specific problem?

The brain shows up in Blocks so it is just the program that fails to download. We are able to download the same program from a Mac to the robot, so it is something specific to the Blocks program on Windows laptop.

I would appreciate any help or guidance. Thanks!

The next update will have a lot more detail on what is going on - the current message is more a catch-all (and unhelpful).

Can you post your project file? Most of the issues we’re seeing with “failed to download” are more compiler errors related to devices/variables/events being named the same thing as something else.

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Thanks for the quick reply. I cannot post the project file because it is on the laptop of one of the other parents (we have a team of 3rd graders).

The project is very simple. Just a drivetrain definition for the “Clutch” robot then a “move forward 1 inch” block followed by a “turn right 90 degress” block. No variables and we don’t have any sensors so no events. We are just starting out with simple programmed movement.

Is there any log file or anything that would give more detailed info?

Same problem. Students receive error code when downloading projects on an updated brain.

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Can you post what the error code the students are getting? The “more details” section should provide information that will help us troubleshoot.

Its says “an error occurred and cannot download”

Myself and our school’s tech guy found that it worked when we tried. So he logged on as a student and it didn’t work. We believe the problem is that students don’t have the right to download.

Is there anyway they can download their codes to the brain without having more rights?

Sounds like the “make” system isn’t able to run… does the error message give you a “Show Details” on the student computers?