Some DLL calls require elevated privileges on Windows. Right-click RVTools.exe → Run as administrator.
The stsservicedll file is part of .NET Framework’s WIF (Windows Identity Foundation). You can manually re-register it.
regsvr32 /u stsservicedll.dll
regsvr32 stsservicedll.dll
The STSServiceDLL error is almost exclusively an authentication library issue.
If you have PowerCLI installed and are still seeing this, try running RVTools as an Administrator to ensure it has permission to load the required DLLs.
Troubleshooting the RVTools "Unknown Error: STSService.dll" If you’re a VMware administrator, RVTools is likely your best friend for quick inventory and health checks. However, encountering the dreaded "Unknown error: STSService.dll" can bring your reporting to a screeching halt. This error usually pops up during the login phase when the application fails to handshake with the VMware Single Sign-On (SSO) service.
The good news? This isn't a "broken" install—it’s usually a configuration or environment mismatch. Here is how to fix it for free. Why Does This Error Happen?
The STSService.dll is a critical component RVTools uses to communicate with the VMware Security Token Service (STS). The "Unknown Error" typically triggers because:
Missing Dependencies: Your system is missing specific Visual C++ Redistributables.
Version Mismatch: You are using an older version of RVTools with a newer version of vCenter (or vice versa).
Pathing Issues: The application can't locate the DLL due to permission restrictions or installation corruption. Step-by-Step Fixes 1. Install Visual C++ Redistributables (Most Common Fix) rvtools unknown error stsservicedll free
RVTools relies on the Visual C++ Redistributable for Visual Studio 2013 (x86). Even if you have the 64-bit version installed, RVTools often specifically requires the 32-bit (x86) package to initialize the STSService.dll. Go to the official Microsoft Download Center. Download and install vcredist_x86.exe. Restart RVTools and try connecting again. 2. Update to the Latest Version of RVTools
Rob de Veij (the creator of RVTools) frequently updates the tool to keep up with VMware’s API changes. If you recently patched vCenter to 7.0 or 8.0, older versions of RVTools will fail to authenticate. Check your version in Help > About.
If you aren't on the latest version, download it for free at RVTools.com. 3. Run as Administrator
Sometimes the Windows OS prevents the application from registering or calling the DLL file properly due to User Account Control (UAC). Right-click the RVTools shortcut. Select "Run as Administrator."
If this works, you can set this permanently under Properties > Compatibility > Run this program as an administrator. 4. Verify .NET Framework Requirements
RVTools is built on .NET. Ensure you have .NET Framework 4.6.2 or higher installed on the machine where RVTools is running. Windows Server updates often catch this, but manual workstations might lag behind. 5. Check the SDK Path
In rare cases, if you have multiple versions of VMware SDKs installed, there might be a conflict. Ensure your installation folder (usually C:\Program Files (x86)\Robware\RVTools) actually contains the STSService.dll file. If it’s missing, a simple reinstall of the application will restore it.
The "Unknown error: STSService.dll" is almost always solved by installing the Visual C++ 2013 x86 Redistributable. Once that bridge is built, RVTools can talk to the VMware SSO service, and you can get back to exporting your environment data.
Pro Tip: Always ensure you are connecting using the FQDN of your vCenter rather than just the IP address to avoid certificate-related handshake errors that can sometimes mask themselves as DLL issues. Some DLL calls require elevated privileges on Windows
Troubleshooting RVTools: Resolving the "STSService.dll" Unknown Error
If you are a VMware administrator, RVTools is likely your go-to for inventory management. However, a persistent "STSService.dll" unknown error has been causing headaches, particularly when using command-line automation or integrating with Remote Desktop Manager (RDM).
The good news? This is typically a known compatibility or configuration issue rather than a fatal flaw in your vSphere environment. What Causes the STSService.dll Error?
The "STSService.dll" error is fundamentally an internal application issue related to how RVTools handles command-line execution and its underlying dependencies. Common triggers include:
Version Mismatches: Using older versions of RVTools (e.g., v4.3.1) with newer versions of integration tools like Remote Desktop Manager.
Working Directory Issues: Since Dell’s acquisition of RVTools, the default installation path has changed to C:\Program Files (x86)\Dell\RVTools.
Dependency Gaps: Missing Microsoft Visual C++ Redistributable packages, which provide critical runtime libraries like VCRUNTIME140.dll. How to Fix It 1. Upgrade Your Software Suite
Most users find that simply updating to the latest versions of both RVTools and any associated management software (like RDM) resolves the DLL conflict.
Note: Ensure you download the official installer directly from Dell Technologies, as it is the only authorized source. 2. Correct the Working Directory regsvr32 /u stsservicedll
If your automated scripts are failing, it might be because the script isn't "seeing" the DLLs in the application folder.
The Fix: In your batch file or PowerShell script, use the cd command to change the working directory to the RVTools installation folder before calling RVTools.exe. 3. Update vCenter Credentials and Syntax
Sometimes the error is triggered by a login failure that isn't clearly reported. RVTools STSService.dll error
RVTools Unknown Error: A Comprehensive Guide to Resolving STSService.dll Issues for Free
Are you experiencing the frustrating "RVTools unknown error" related to STSService.dll? You're not alone. Many users have encountered this issue while using RVTools, a popular virtualization management tool. In this article, we'll provide a detailed guide on how to resolve the STSService.dll error and get RVTools up and running smoothly, all for free.
What is RVTools and STSService.dll?
RVTools is a free tool developed by VMware that allows administrators to manage and monitor their virtual infrastructure. It provides valuable insights into virtual machine (VM) performance, resource utilization, and configuration. STSService.dll, on the other hand, is a dynamic link library (DLL) file associated with RVTools. This DLL file is responsible for providing certain functionalities to RVTools, and without it, the tool may not function properly.
Causes of the RVTools Unknown Error STSService.dll
The "RVTools unknown error" related to STSService.dll can occur due to various reasons, including:
Free Solutions to Resolve RVTools Unknown Error STSService.dll
Don't worry; we've got you covered. Here are some free solutions to resolve the RVTools unknown error related to STSService.dll: