failed to upgrade 3CX

[shenwei]

Hi,

As 3CX informed that it had already extended the maintenance to the end of October, but we still failed to upgrade our 3CX system. We tried to refresh the license and no luck. Any one knows how to fix it?

Thanks.

 

[YiannisH_3CX]

Hello @shenwei

What PBX version are you currently running? Also are you getting an error when you try to upgrade?

 

[shenwei]

@YiannisH_3CX, it's V15.5. There was an error message like attached.

 

[shenwei]

@YiannisH_3CX, the partner said that they could see that the maintenance had been extended inside their portal. However, in the management console, nothing changed, still out of maintenance.

 

[YiannisH_3CX]

Please note its not the maintenance that is the problem here but the fact that your PBX cannot communicate with the activation server.
Try configuring the Network Adapter with the 1st DNS to Google 's DNS ( 8.8.8.8 ). and do an ipconfig /flushdns, (possibly restart of Server)
to confirm that the PBX can reach the ERP to activate, open cmd and type nslookup activation.3cx.com and you should see a reply.