# GNSS survey error messages

The following messages indicate a problem during a GNSS survey or when you attempt to start one.

Error: Outside usage region

If this message appears when starting a survey, the connected receiver is unable to be used in the current geographic location. For more information, contact your Trimble distributor.

Receiver supports Location RTK precisions, set style tolerances accordingly

If this message appears when starting an RTK survey, the connected receiver supports Location RTK, which limits the precision of the RTK solution in the receiver. Tap Yes to change the survey style precision settings to match the Location RTK precision limit of the receiver. If the survey style is already set to a higher precision than the Location RTK precision limit of the receiver, then the survey style is not updated.

When the receiver has Location RTK enabled, the status line shows RTK: Float. You cannot store fixed positions when Location RTK is enabled in the receiver.

Tap No to keep the current survey style precision settings.

Cannot start streamed corrections

If this message appears during an RTK survey, make sure that the internet connection you are using works outside of the Trimble Access software. Connect to the internet and make sure you can connect to a frequently updated web page such as a news web page. Leave that connection open and start a survey in the Trimble Access software. If the survey still fails to start correctly, there may be a problem with the IP address or port number in the style, or the base station providing the data may not be operational.

No Base Data

If you start an RTK survey and the No base data message appears, check the broadcast format, the initialization string for your modem, the IP address, and the port number of the base.

Warning: Base coordinates different. Coordinates of base point <Point name> in job differ from received coordinates

If this message appears when receiving RTK corrections, it means that the point name of the base received from the base data link is the same as a point name already in the job file, and the two points have different coordinates. If you are certain that the base is set up on the same point as the one already in the job database, then tap Job to use the job database coordinates for the point. If the base is in a different location to the point already in the job database, then you must change the point name. Tap Received to use the coordinates received from the data link and rename the new base point. Tap Cancel to cancel the survey.

If you have an RTX‑RTK offset in the job, you will not be given the choice of using the received coordinates for the base. Correct use of the offset relies on all RTK being in the same terms, and if the point with different coordinates to those already in the job comes from the base this could mean the RTK is not in the same terms.