Windows Schannel patch KB 3061518 causes problems with DSLS Catia, Enovia

If you’re running the Dassault Systèmes license service for the Catia or Enovia CAD program, avoid KB 3061518

Windows Schannel patch KB 3061518 causes problems with DSLS Catia, Enovia
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I'm seeing confirmation from several independent sources that Tuesday's Windows Schannel patch, KB 3061518, is preventing Catia and Enovia (both 3D CAD programs from Dassault Systèmes) from pulling licenses from the license server. Removing KB 3061518 fixes the problem.

I haven't seen official confirmation from Dassault or Microsoft, but the anecdotal evidence is overwhelming.

(t/h NS, SB, GB and Anonymous SANS ISC)

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