If you move a project from an old Windows XP machine to Windows 10 or 11, the file paths often change. If the project file ( .vbp ) has a hardcoded path to the TLB that doesn't exist on the new machine, it will throw an error.
If you're developing a COM component or an ActiveX control in VB6, your project can also generate a type library: vb6tmpltlb
This feature would act as an automated self-healing layer for the legacy Visual Basic 6.0 environment. Automated Registry Validation If you move a project from an old
Microsoft's official recommendation for a persistent "Missing or Not Registered" error is a clean uninstall and reinstall. : Remove VB6 through the Control Panel. vb6tmpltlb