BIM 360 Not Syncing

The sync icon spins or fails, and you’re not sure the team has your latest work.

BIM 360 Not Syncing: Common Causes and How to Fix It

You save your file, you expect it to show up in BIM 360 for the rest of the team, and it just sits there. The little sync icon spins, or worse, it shows a red “failed” warning. Now you are not sure if your teammate has your latest work, and that uncertainty is its own kind of stress.

BIM 360 sync problems are one of the most common headaches we see at firms using Autodesk’s cloud. The frustrating part is that “not syncing” can mean a few different things with a few different causes. Once you know what to look for, most of them are quick to clear.

Here is the short version. BIM 360 usually stops syncing because of the Desktop Connector: it gets overloaded, runs into a network slowdown, hits a file that is locked by someone else, or conflicts with other software. Resetting and updating the Desktop Connector fixes most cases. Let’s walk through it.

Most “not syncing” complaints are really Desktop Connector complaints.

First, what is actually syncing here?

Let’s get the pieces straight, because “BIM 360 not syncing” can point at two different things.

The Desktop Connector. This is a small Autodesk program that puts your BIM 360 files into a folder on your computer, so they look like normal files in Windows. When you save, the Desktop Connector pushes the change up to the cloud. Most “not syncing” complaints are really Desktop Connector problems.

Revit cloud worksharing. This is when your live Revit model lives in BIM 360 and the team syncs to central in the cloud. That is a different sync, handled inside Revit itself.

For this post, we are mostly talking about the Desktop Connector, because that is where the majority of sync trouble lives. If your problem is Revit cloud worksharing being slow, that usually comes down to internet speed and model size, which is its own topic.

Cause 1: Too many files at once

The Desktop Connector is helpful, but it can get overwhelmed. This is the most common cause we see.

For example, let’s say you drag a folder of 500 drawings into your BIM 360 folder in Windows all at once. The Desktop Connector tries to upload everything in a flood, chokes, and stops syncing.

The fix is twofold:

• For big batches, upload through the web portal instead. Go to BIM 360 in your browser and upload there. Autodesk actually recommends this over dragging large numbers of files through Windows.
• Work with fewer xref-heavy files open at once. Lots of attached reference drawings (xrefs) open together puts heavy strain on the Connector and can break syncing.

Cause 2: Network and internet slowdowns

BIM 360 lives in the cloud, so your connection to the internet matters more than people think.

If your internet is slow, or your upload speed is weak, syncs stall, restart, or crawl. This catches firms off guard because their internet feels fine for email and browsing. But pushing big model files up to the cloud needs real upload bandwidth, and a lot of office internet plans are built for download, not upload.

A few things to check:

• Test your upload speed, not just download. They are often very different.
• See if it is worse at certain times, like when everyone is on video calls. That points to a bandwidth crunch.
• Wired beats Wi-Fi for anyone pushing big files to BIM 360 all day.

If your internet truly cannot keep up with cloud work, that is worth a real conversation about your connection. No amount of clicking “retry” fixes a pipe that is too small.

Cause 3: Files locked by someone else

BIM 360 uses file locking to stop two people from overwriting each other. That is a good thing. But it can look like a sync failure when it is really a lock.

Here is what happens. You try to save or sync a file, but someone else has it open or checked out. The system holds your change because letting it through would clobber their work. Sync issues are often really locking issues, where a file did not lock or unlock cleanly between users.

If you see a sync stuck on a specific file, check whether a teammate has it open. Sometimes the answer is as simple as asking the team and waiting for the other person to close out.

Cause 4: Conflicting software

This one is sneaky, because the cause is a totally different program.

Some apps interfere with the Desktop Connector. Antivirus tools and certain backup or sync programs are common culprits. The symptoms look like sync trouble: files will not save, projects will not open, the Connector acts up.

To test for this, the trick is to shut down the suspect program for a bit and see if syncing starts working again. If it does, you found your conflict, and then it is about setting things up so the two can coexist. This is exactly the kind of detective work that is hard to do mid-deadline and easier to hand to someone who has seen it before.

Cause 5: A Desktop Connector that just needs a reset

Sometimes the Connector simply gets into a bad state, the way any program can. The fix is not fancy.

Reset the Desktop Connector. Autodesk’s own guidance says a reset to default clears most sync problems. It clears out the stuck local cache and starts fresh.

Update the Desktop Connector. Autodesk updates this tool often, and older versions have bugs that newer ones fixed. Running an out-of-date Connector is one of the most common reasons people fight problems that were already solved.

This is the same lesson as keeping Revit versions matched. Out-of-date software causes problems that are invisible until they bite. Someone has to actually keep these tools current, because they will not do it on their own.

A simple fix order

When BIM 360 stops syncing, work through this list:

1. Update the Desktop Connector to the latest version.
2. Reset the Desktop Connector to default if it is acting up.
3. Check your internet, especially upload speed. Slow upload stalls cloud syncs.
4. Look for a locked file that a teammate has open.
5. Test for conflicting software like antivirus or backup tools by pausing them.
6. For big batches, upload through the web portal, not by dragging files in Windows.

Most sync problems clear up in the first two steps. The rest are for the stubborn cases.

Being proactive beats fighting fires

Here is the bigger picture. A lot of BIM 360 sync trouble is not random. It comes from out-of-date software, an internet connection that is too small for cloud work, or conflicting programs nobody set up to play nice. Those are all things you can get ahead of.

The reactive version is your team losing time every week to “why won’t this sync,” and never quite trusting that everyone has the latest files. The proactive version is keeping the Connector updated, sizing your internet for the cloud work you actually do, and sorting out conflicts once so they stop coming back.

We keep the cloud running smooth

Managing BIM 360, the Desktop Connector, internet bandwidth, and the software that fights with it, across a whole team, is a real job. It is the kind of thing we handle for small architecture and engineering firms around Knoxville, so your people can focus on the work, not on babysitting a sync icon.

If BIM 360 keeps stalling on you, give us a call. We will find out which of these causes is hitting you and stop it at the root.

Common questions about BIM 360 sync problems

Sources: Autodesk (Sync issues with AutoCAD, Desktop Connector, and BIM 360; Files not syncing as expected in Desktop Connector; Sync fails, stops, restarts, or is slow; Known conflicting software), ImagineIT (Desktop Connector best practice).