I have MediaLab and DirectRT installed on my PC desktop. Both of them were working fine, however, few months ago, when I tried to run Media Lab I got the following Windows message:

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Run-Time error '339':

Component 'comdlg32.ocx' or one of its dependencies not correctly registered: a file is missing or invalid

(see attached image)
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Since then, while DirectRT has continued to work properly, I was not able to run any MediaLab file or experiment. Now I need to run an experiment, but I don't know hot to get MediaLab back to work.

Does someone know what should I do?

Thanks. Best Regards,


Paolo