The A Specified Parameter Was Not Correct – Info ProductVersion error means the ESXi host version is not compatible with your vCenter build.
This message usually appears while you add or reconnect an ESXi host in vCenter, and the task stops with almost no extra detail. The good news is that the A Specified Parameter Was Not Correct – Info ProductVersion alert points to a narrow set of version and configuration issues, so once you check those, the error often clears without drama.
What The “A Specified Parameter Was Not Correct – Info ProductVersion” Error Means
In vSphere, every host reports a long list of properties to vCenter, including its build, edition, and hardware details. One of those properties is the internal field info.productVersion, which tells vCenter exactly which ESXi release the host runs. When vCenter validates a host during an add or reconnect task, it checks that this value makes sense for the current setup.
When you see “A specified parameter was not correct: info.productVersion”, vCenter is basically saying “the product version I just read from this host does not fit with what I can work with.” That usually points to a mismatch between vCenter and ESXi versions, or to a stale vCenter component that does not understand the host’s reported build.
The error does not mean the host is broken or that virtual machines are damaged. It simply blocks the management connection. Until you fix the cause, you cannot manage that host from this vCenter instance, place it in clusters, or use features such as vMotion or DRS through that console.
A Specified Parameter Was Not Correct – Info ProductVersion Error In Vcenter
Admins most often hit the A Specified Parameter Was Not Correct – Info ProductVersion error during common life-cycle tasks. You might upgrade one ESXi host to a newer major version while the vCenter stays on an older release, or you might roll out a fresh vCenter and try to attach every existing host without checking the compatibility lists first.
Forum threads and vendor notes show a pattern: the error appears when the ESXi build is newer than anything the current vCenter release expects, or when the vCenter build is so new that it no longer accepts very old ESXi versions. In both directions, once the pair falls outside the supported range, the info.productVersion field fails validation and you see this message.
This is why two hosts can behave differently. One ESXi box joins vCenter without trouble, while another one on a slightly different build fails with the same task and throws A Specified Parameter Was Not Correct – Info ProductVersion. On the surface both steps look identical, yet the internal version checks lead to a different result.
Info.Productversion Parameter Error When You Add A Host
When you add a host, vCenter performs a series of checks before it lets the operation finish. If any of the checks fails, it stops the task and returns the most relevant error text. With the info.productVersion parameter error, the checks that matter fall into three broad buckets: vCenter and ESXi compatibility, client mismatch, and hidden configuration leftovers from older setups.
Signs that point to a pure version compatibility problem include a brand new ESXi major release in a setup that still runs an older vCenter, or a brand new vCenter that manages hosts from many years ago. In those cases, the host may show up briefly in the inventory, then disconnect during validation and throw the same message every time you try again.
Sometimes the mismatch sits in the tools you use rather than the core platform. An outdated HTML client, old plug-ins, or scripts using legacy SDKs may send incomplete or malformed host details, including the product version field. vCenter then fails to parse that value and surfaces the A Specified Parameter Was Not Correct – Info ProductVersion text.
On a smaller share of setups, the issue tracks back to a stale database entry or an old vCenter instance that still holds records for the same host. When two controllers fight over the same ESXi node, vCenter may read inconsistent metadata and complain about parameters such as info.productVersion, even if the raw versions would normally match.
Check Vcenter And Esxi Compatibility First
Before you chase rare bugs, confirm that your vCenter and ESXi versions actually fit within the supported range. Vendor guidance makes it clear that each vCenter release only manages a window of ESXi versions. Newer platforms drop very old hosts, while older vCenter builds do not always understand the latest ESXi releases.
Use the official product compatibility pages to check your exact builds, then compare them with a simple summary like the one below. The table does not replace the full matrix, yet it helps you spot the pairs that almost always trigger the info.productVersion parameter error.
| vCenter Major Version | ESXi Versions It Typically Manages | When You See Info ProductVersion |
|---|---|---|
| 6.7 | 6.0, 6.5, 6.7 (later 7.x often blocked) | Host already on 7.x or newer, vCenter still on 6.7 |
| 7.0 | 6.5, 6.7, 7.x | Host on 6.0 or older, or host on very new 8.x builds |
| 8.0 | 7.x, 8.x | Host still on 6.x, which vCenter 8 no longer manages |
If your pair sits outside a supported row, the fix is clear: align versions so that vCenter and ESXi meet in a valid range. Most admins choose to upgrade vCenter first, then bring hosts up to matching builds. In some tight change windows, you might instead move one host down to an older release that the current vCenter can still handle, though this path brings its own trade-offs.
Step-By-Step Fixes For The Info Productversion Error
Once you know which version pairs should work, you can clear the A Specified Parameter Was Not Correct – Info ProductVersion error with a short list of focused actions. Walk through them in order so you do not skip a simple fix while chasing rare edge cases.
- Confirm Exact Builds On Both Sides — In the vSphere client, check the “About” section for vCenter and the Summary tab for the ESXi host. Write down the full versions and build numbers rather than just “7” or “8”. This makes it easier to compare against the official compatibility matrix.
- Check The Official Compatibility Matrix — Open the vendor’s interoperability matrix in a browser, plug in your vCenter version, and read which ESXi releases match it. If your host build is not listed at all, treat that as a red flag for the info.productVersion parameter check.
- Upgrade Vcenter Before Hosts — When the host is on a newer major release than vCenter, plan a vCenter upgrade to a release that clearly lists that ESXi version as supported. Keep good backups of the vCenter appliance and database, then perform the upgrade during a controlled window.
- Standardize Host Builds — If one host joins vCenter while another triggers the error, align the odd one to the same ESXi build as the working nodes. Apply the matching image profile or baseline, reboot, and try the add task again from vCenter.
- Use A Current Vcenter Client — Always connect through the current HTML5 client that ships with your vCenter appliance. Avoid legacy thick clients or browser sessions cached from much older builds, since they can send outdated data structures that confuse version checks such as info.productVersion.
- Restart Management Services On The Host — On the ESXi console or through SSH, restart the management agents. This refreshes the host’s connection state and forces it to resend fresh product version data to vCenter during the next add attempt.
- Remove Ghost Entries Before Re-Adding — If the same host appears in the inventory in a disconnected state, remove it cleanly from the list, wait a short moment, and then run the add host wizard again. This clears stale records that might hold an older product version string.
- Power Down Old Vcenter Appliances — After a migration, an older appliance sometimes stays powered on and still believes it owns certain hosts. Shut it down or disconnect it from those nodes so that only one vCenter talks to each host during validation.
Between these steps, most setups move from a stubborn A Specified Parameter Was Not Correct – Info ProductVersion error to a clean, completed task. When the message still appears after a full version and inventory cleanup, it is time to look at deeper log signals.
Advanced Checks When The Error Keeps Returning
If the obvious version pairs look valid and you still see the info.productVersion message, the cause may sit one layer lower, in databases or network details. At this point you want to confirm that vCenter reads correct host information and that nothing on the path between them tampers with the connection.
Start with DNS and time. A host that resolves to multiple names or IPs, or a host with a clock that differs by hours, can confuse vCenter when it tries to match records. Use short tests: ping the host from vCenter by name and by address, and check that the returned values stay consistent. Also check that both sides use the same time source and show similar timestamps.
Next, review vCenter logs around the failed add task. Open the vpxd log on the vCenter appliance and search for “info.productVersion” near the timestamp of the latest failure. The surrounding lines often show which internal check complained and whether vCenter saw the host as unsupported, duplicated, or in some other blocked state.
Repeat the same approach on the ESXi side in the hostd log. Look for entries that mention connection attempts from this vCenter instance, and note whether the host itself reports any error or warning around its product version string. Matching the two views helps you see if the host misreports its version or if vCenter simply refuses a valid one.
If the logs point to database issues, such as duplicate records for the same host or phantom resource pools, consider a short session with vendor engineers through a formal case. They can safely clean or adjust database entries behind the scenes while you keep a clear record of every change.
Prevent The Info Productversion Error Next Time
Once the A Specified Parameter Was Not Correct – Info ProductVersion error is gone, it makes sense to set a few habits that keep it from coming back during the next upgrade cycle. Most of these habits come down to planning and consistency across the whole vSphere stack.
First, always upgrade vCenter before hosts when you move to a new major generation. That single rule keeps info.productVersion checks on your side because the controller already understands newer ESXi builds. Only after vCenter runs smoothly on the new version should you move hosts across in batches.
Second, avoid a mix of random host builds wherever you can. Pick a tested ESXi patch level per cluster and keep every node in that cluster on the same image profile. This reduces the chance that one outlier host reports a product version string that vCenter has never seen in that setup.
Third, document version pairs in simple language. For each vCenter, note which ESXi major versions it manages and which ones fall outside the range. Keep that note close to your change plans, so anyone scheduling upgrades can see at a glance whether a proposed move will risk the info.productVersion parameter error.
Last, use a small lab or non-production cluster to test upgrades and host add tasks before you touch busy clusters. If the A Specified Parameter Was Not Correct – Info ProductVersion message appears during a test add, you can fix the path there and adjust your plan, instead of hitting the issue for the first time in a live rollout.
Handled this way, the error turns into a quick reminder about version planning instead of a surprise during host deployment. With clear upgrade order, consistent host builds, and a regular habit of checking compatibility pages, you keep vCenter and ESXi aligned so the info.productVersion parameter never blocks your work again.