PROBLEM
Attempts to collect a point feature using a Global Navigation Satellite System (GNSS) receiver with Collector for ArcGIS (Windows) intermittently return errors indicating "Location unavailable" or "Position not available". Additional tests using the same point feature with other ArcGIS applications and functions such as point averaging or creating lines and polygons indicate it is working as intended.
This issue is unique to single point features in Collector for ArcGIS (Windows) and occurs due to the desynchronization of the Windows operating system (OS) clock with Collector for ArcGIS (Windows). The error message is returned if a difference of even a few seconds is detected when comparing the time clocked by the GNSS receiver with the time clocked by the OS.
The OS time can be inaccurate especially when working offline for extended periods or if the setting to automatically synchronize the clock is disabled.
Note: Collector for ArcGIS (Android) and (iOS) compares previous location time instead of OS time, and therefore is not affected if the OS time is not synchronized with the application.
Resolve the issue by enabling the option to synchronize and update the Windows OS time. If working offline and synchronization is not disabled, it is recommended to re-establish connectivity to allow Windows to update the time automatically.
The following methods are applicable if synchronization is disabled:
Enable and update time synchronization
This workaround is applicable if the Windows time synchronization setting is disabled. To re-enable synchronization and update the time:
Use the Windows Run Command
Use the Windows Command Prompt
net stop w32time
w32tm /unregister
w32tm /register
net start w32time
w32tm /resync
Note: W32tm.exe is used to configure Windows Time service settings. It can also be used to diagnose problems with the time service.
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