If you are a VMware administrator, RVTools is likely a staple in your management toolkit. This lightweight, free utility provides exceptional visibility into vSphere environments. However, many users encounter a frustrating roadblock when attempting to connect to a vCenter Server: a popup window declaring an referencing STSService.dll .

If you are a VMware administrator, 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).

RVTools relies heavily on .NET. If the framework is corrupted, .dll loading will fail. Download the Microsoft .NET Framework Repair Tool. Run the tool to fix any corruptions in the installation. 4. Re-register the DLL Files

Because RVTools is a third-party application (maintained by Rob de Veij), Broadcom/VMware support typically refers these issues back to the developer or Dell Technologies for resolution. Devolutions Forum