QuickBooks Error 6073: why the file is locked & how to fix it.
Error 6073, -816 means QuickBooks Desktop can’t open the company file because it’s locked or in use — typically the file is open on another computer in single-user mode, opened by another user, hosted on multiple computers at once, or sitting on a read-only or synced network location. Below: the causes in order of likelihood, the ordered self-fix, and when to call a Certified ProAdvisor. Independent firm, not affiliated with Intuit Inc.
Error 6073, -816 appears when QuickBooks Desktop can’t open the company file because it’s locked or already in use — usually because the file is open on another computer in single-user mode, opened by another user, hosted on more than one computer, or stored on a read-only or synced (Dropbox/OneDrive) location. Five causes account for the large majority, and the self-fix steps work in order of likelihood; confirming no one else has the file open and switching hosting to a single host resolves Error 6073 in many cases. Error 6073 is a QuickBooks Desktop and Enterprise error — it does not appear in QuickBooks Online.
Reference maintained by the Certified QuickBooks ProAdvisor team at TechBrot Inc., an independent firm — not Intuit’s software support. Not affiliated with Intuit Inc.
Error 6073, in five questions.
What is QuickBooks Error 6073?
A QuickBooks company-file locking error (usually shown as “Error 6073, -816”): QuickBooks Desktop can’t open the company file because it’s locked or already in use. It commonly appears when the file is open on another computer in single-user mode, opened by another user, hosted on more than one computer, or stored on a read-only or synced network location. Exclusive to QuickBooks Desktop and Enterprise — it does not occur in QuickBooks Online.
What causes Error 6073?
Five causes account for the large majority: (1) the file is already open elsewhere in single-user mode; (2) more than one computer is set to host the file; (3) the file is read-only or sits in a shared/synced (Dropbox/OneDrive) folder; (4) a prior session didn’t close cleanly and left a lock behind; (5) a Linux/server hosting or permission issue.
Can I fix Error 6073 myself?
Often yes, in order of likelihood: make sure no one else has the file open and close it everywhere; switch to multi-user mode or ensure only ONE computer hosts the file; run QuickBooks Tool Hub (Quick Fix my File, then File Doctor); move the file out of a synced folder (Dropbox/OneDrive) to a normal local or server path; check read-only permissions on the file and folder; restart the host computer. Confirming the file is closed everywhere and that one computer hosts it clears Error 6073 in many cases.
When does Error 6073 need a ProAdvisor?
When self-fix doesn’t resolve it, the multi-user hosting won’t stay stable, or the file lives on a synced/cloud folder that keeps re-locking it — a signal the hosting or storage setup needs to be corrected properly rather than reset each time.
How is Error 6073 related to other QuickBooks file errors?
Like the 6000-series and the H-series multi-user errors, Error 6073 is about access to the company file. 6073, -816 is specifically a locked / in-use error tied to single-user vs multi-user state, conflicting hosting, read-only or synced storage, or a stale lock. Multi-user hosting codes such as H202 share the same diagnostic approach: fix who hosts the file and how it’s reached, then open it.
Certified QuickBooks ProAdvisor credentials.
4
core QuickBooks platforms certified — Desktop, Enterprise, Online (Level 2), Payroll
L2
QuickBooks Online ProAdvisor tier (the highest)
Yearly
Annual Intuit re-certification
- Error 6073 is a Desktop/Enterprise company-file locking error — resolving it takes fluency in single- and multi-user hosting, network paths, file permissions, and stale-lock recovery.
- Every ProAdvisor holds active Desktop and Enterprise certifications; Intuit’s public ProAdvisor directory lists active ProAdvisors for verification.
- Operational experience to diagnose Error 6073 past the documented surface steps — not a script-reading queue.
Error 6073, plainly.
Error 6073, -816 appears when QuickBooks Desktop can’t open the company file because the file is locked or already in use. You most often see it when someone else has the file open in single-user mode, when more than one computer is set to host the file, when the file lives in a read-only or synced (Dropbox/OneDrive) folder, or when a previous session didn’t close cleanly and left a lock behind. The error is QuickBooks telling you it reached the file but was refused exclusive access to it — whether that’s another user holding it open, conflicting hosting, a read-only path, or a stale lock from a crashed session.
The good news is that Error 6073 is highly fixable, and the self-fix steps below work in order of likelihood — confirming the file is closed everywhere and that only one computer hosts it resolves it in many cases before deeper troubleshooting is needed. If self-fix doesn’t resolve it, the multi-user hosting won’t stay stable, or the file sits on a synced/cloud folder that keeps re-locking it, a Certified ProAdvisor diagnostic identifies the deeper cause and corrects the hosting or storage setup properly. Error 6073 is a QuickBooks Desktop and Enterprise error; it does not appear in QuickBooks Online.
Five common causes, in order of likelihood.
The self-fix steps address these in the same order — so working through them sequentially resolves Error 6073 efficiently.
Cause 01 · The file is already open elsewhere in single-user mode
The most common cause. When the company file is open in single-user mode on another computer — or by another user — QuickBooks refuses everyone else exclusive access and reports Error 6073, -816. Single-user mode permits exactly one open session, so a second attempt is locked out.
Cause 02 · Multiple computers are set to host the file
If more than one computer has hosting (multi-user access) turned on for the same file, they compete to control it and the lock conflicts. Only one machine — the host or server — should host the company file. A workstation mistakenly set to host is a frequent trigger for 6073.
Cause 03 · The file is read-only or in a shared/synced folder
A company file stored in a Dropbox, OneDrive, or other synced folder — or on a read-only network share — gets locked by the sync client or denied write access. QuickBooks needs exclusive read/write access to a stable path, which synced and read-only locations can’t reliably provide.
Cause 04 · A prior session left a lock behind
If QuickBooks or the computer crashed, or a session closed abnormally, the company file can be left flagged as still in use. The stale lock makes QuickBooks treat the file as open by someone else even when no one is in it, producing Error 6073, -816.
Cause 05 · Linux/server hosting or permission issue
When the file is hosted on a Linux server or a server share, a hosting-service or file-permission problem on that host can block the exclusive access QuickBooks needs. The account QuickBooks runs under, or the server’s hosting configuration, denies the lock and 6073 results.
How to fix Error 6073 yourself.
Six steps, in order. Most Error 6073 cases clear within the first two — if all six don’t resolve it, stop and book a diagnostic.
Make sure no one else has the file open — and close it everywhere
Confirm the company file isn’t open on any other computer or by any other user, and close it everywhere it’s open. If you can’t verify who has it, close QuickBooks on every machine that uses the file, then reopen it from one computer. In single-user mode only one session is allowed at a time.
Switch to multi-user mode (or ensure only ONE computer hosts)
If several people need the file at once, switch to multi-user mode so concurrent access is supported. Then check hosting: only the host computer or server should have hosting (multi-user access) turned on. Turn hosting OFF on every workstation so a single machine controls the file.
Run QuickBooks Tool Hub (Quick Fix my File, then File Doctor)
Open QuickBooks Tool Hub → Company File Issues → Quick Fix my File, then run QuickBooks File Doctor. This repairs hosting and file-access settings automatically and can clear a stale lock. Run it on the computer that stores the file when possible.
Move the file out of a synced folder to a normal path
If the company file lives in Dropbox, OneDrive, or another synced folder, move it to a normal local folder (or a proper server share) and open it from there. Synced clients lock files as they upload, which collides with the exclusive access QuickBooks needs.
Check read-only permissions
Right-click the company file and its folder and confirm the file is not marked read-only and that the Windows account QuickBooks runs under has full read/write permission. A read-only attribute or a folder-permission gap denies the lock QuickBooks needs to open the file.
Restart the host, then escalate
Restart the host computer (and the server, if the file is server-hosted) to clear any lingering lock or stalled hosting service, then reopen the file from one machine. If Error 6073 persists after that — or the hosting won’t stay stable — stop and book a diagnostic. A Certified ProAdvisor corrects the hosting or storage setup against a written scope.
Self-fix didn’t clear Error 6073?
A Certified ProAdvisor diagnoses the deeper cause — typically a $1,200–$3,000 fixed-fee scope. Independent firm.
Three signals it’s a ProAdvisor call.
It persists after all six steps
You’ve worked the ordered fix and Error 6073 still locks the file. The cause is past the documented surface — usually a hosting conflict, a stuck lock, or a storage path that keeps denying exclusive access.
Multi-user hosting won’t stabilize
You set one host and turn hosting off on the workstations, but the file keeps locking or hosting reverts. A configuration or server-side problem is re-claiming the file and needs to be corrected properly rather than reset each day.
The file is on a synced/cloud folder that keeps locking
The company file sits on Dropbox, OneDrive, or a similar synced location and re-locks even after you move it — a sign the storage setup needs to be re-architected so QuickBooks has a stable, exclusive path.
A Certified ProAdvisor diagnoses past the surface.
When the documented steps don’t hold, the cause is usually past the surface — conflicting hosting where more than one computer claims the file, a stale lock from a session that crashed, a read-only network path or permissions problem, or a company file living on a synced (Dropbox/OneDrive) folder that keeps re-locking it. A Certified ProAdvisor with active Desktop and Enterprise certifications diagnoses the actual root cause, corrects the hosting or storage setup against a written scope, and verifies the file opens cleanly for the right users before closing. Independent firm — not Intuit, and not Intuit’s software support.
Diagnostic
30-minute diagnostic, usually scheduled within a day
$1,200–$3,000
typical fixed-fee scope for focused Error 6073 resolution
Independent
Certified ProAdvisor firm — not Intuit, not Intuit’s software support
What people ask about Error 6073.
Is this Intuit’s official support?
What is QuickBooks Error 6073?
What causes QuickBooks Error 6073?
Can I fix QuickBooks Error 6073 myself?
When does Error 6073 require a ProAdvisor?
Why does the file keep locking on Dropbox or OneDrive?
Does Error 6073 appear in QuickBooks Online?
Self-fix didn’t resolve it?
File still locked? Book a diagnostic.
If Error 6073 persists after the steps, multi-user hosting won’t stabilize, or the file keeps locking on a synced/cloud folder, a 30-minute diagnostic surfaces the real cause — typically a $1,200–$3,000 fixed-fee scope for focused resolution. Independent ProAdvisor firm, written scope before any work begins.