Consider the possibility of a corrupted SolidWorks 2012 installer or failing hard drive (bad sectors on the DLL files). Run chkdsk /f /r on your system drive.
If you are reading this, you have likely already tried the basics: rebooting, running as administrator, or reinstalling SolidWorks. Unfortunately, because SolidWorks 2012 is now considered legacy software (no longer supported by Dassault Systèmes), standard support channels are closed. This guide will walk you through every known fix, from registry tweaks to dependency repairs. When SolidWorks starts, it loads dozens of dynamic link libraries (DLLs) and supporting files from the SolidWorks installation folder, Windows\System32 , and SolidWorks Data (Toolbox). The "cannot initialize library" error means that one or more critical libraries failed to load, register, or execute properly during initialization. error cannot initialize library solidworks 2012
This article is provided for troubleshooting purposes. SolidWorks is a registered trademark of Dassault Systèmes. Consider the possibility of a corrupted SolidWorks 2012
regsvr32 swactwiz.dll regsvr32 swloaders.dll regsvr32 swdocumentmgr.dll regsvr32 swshell.dll regsvr32 swregsvr.dll regsvr32 swu.dll regsvr32 swwindowsextension.dll regsvr32 DllUninstaller.exe regsvr32 swmsgs.dll SolidWorks 2012’s old UI components rely on Visual Basic 6 runtime files. The "cannot initialize library" error means that one
regsvr32 mscomctl.ocx regsvr32 comctl32.ocx regsvr32 comdlg32.ocx If any file is missing, download the from Microsoft. Step 4: Repair .NET Framework SolidWorks 2012 requires .NET Framework 3.5 SP1 (including 2.0 and 3.0). On Windows 10/11, this feature is not enabled by default. 4.1 Enable .NET 3.5 on Windows 10/11 Open Control Panel → Programs → Turn Windows features on or off . Check .NET Framework 3.5 (includes .NET 2.0 and 3.0) . Click OK. Windows will download necessary files from Windows Update. 4.2 If Enable Fails (Offline Install) Download the .NET 3.5 CAB from Microsoft or use DISM command (requires Windows installation media mounted as D:):
SolidWorks 2012 cannot read files from versions newer than 2012, but modern versions (2020+) can open 2012 files. If you rely on 2012 for legacy work, the long-term solution is either a dedicated Windows 7 PC or migrating your designs to a newer SolidWorks version (student edition or commercial subscription). Need further help? While official support for SolidWorks 2012 ended in 2015, active user communities remain. Post your Event Viewer error details and the exact step that failed in this guide to forums like Reddit’s r/SolidWorks or the DSC (Dassault Systèmes Community) legacy section.
cd /d "C:\Program Files\SolidWorks Corp\SolidWorks" (For 32-bit SolidWorks on 64-bit Windows: cd /d "C:\Program Files (x86)\SolidWorks Corp\SolidWorks" ) Run these commands one by one. Ignore errors about missing entry points – some DLLs are not self-registering.
