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Connection Error: This error can be caused by an inaccurate time on the system clock, or by temporary system unavailability.

Issue

When you launch Autodesk software that uses a Desktop Subscription license, you get a connection error indicating that the system clock may be inaccurate and the software does not launch:

Connection error
 
This error can be caused by an inaccurate time on the system clock, or by temporary system unavailability. Please check the system clock and try again.
 
 
Solution
  1. Verify that the date, time, time zone, and Daylight Saving Time settings are all correct for your current location.
  2. If they are correct, change each setting one at a time and apply the changes (OK).  Then restore the original setting and apply the changes again.
  3. Test each time to see if the software will launch successfully.
  4. In particular, try removing the check mark from "Automatically adjust clock for Daylight Saving Time" and apply the change (OK). Then select "Automatically adjust clock for Daylight Saving time," and apply the change again.

Note: on a personal computers you may also need to synchronize your computer clock with an Internet time server, if your computer is on a domain, you can't synchronize your clock with an Internet time server.
  1. Open Date and Time by clicking the Start button Picture of the Start button, clicking Control Panel, clicking Clock, Language, and Region, and then clicking Date and Time. 
  2. Click the Internet Time tab, and then click Change settings. Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
  3. Select the check box next to Synchronize with an Internet time server, select a time server, and then click OK.
  4. If you get the error "An error occurred while Windows was synchronizing with time-b.nist.gov", try changing the internet time server to time.windows.com.
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