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You are currently viewing the content available in Vietnam. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
What causes a "Runtime Error 372 - Failed to load control 'LFile' from SKCL.dll. Your version of SKCL.dll may be outdated"?

This error usually occurs when authorizing Concept, Proworx or Control Expert 14 (Unity Pro software. The SKCL.dll must reside in the \windows\system32 or \winnt\system32 folder. If it currently resides in this folder, you may need to register the .DLL.
To do this, bring up a DOS shell and type:

c:\> regsvr32 skcl.dll

DLL Error

You should then be able to launch the Authorization utility.


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