Nils Lang Posted June 9, 2016 Posted June 9, 2016 The most common cause for this error is that your Internet access settings (Anti Virus, Firewall or Proxy) prevent PVsyst from accessing our server directly. For instructions on allowing access, consult your network administrator or your Anti Virus, Firewall or Proxy documentation.Another alternative is to use our external activation procedure. This procedure is documented in PVsyst help or in our tutorials:
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