In LINKPlanner V4.6.1 we added new functionality on PTP 670 HCMP, which has added additional information to all project files, even if you are not using PTP 670 HCMP. This new information cannot be read by older versions of LINKPlanner.
If you try and open a LINKPlanner file saved in either V4.6.1 or V4.6.2 in an older version of LINKPlanner you will see the following error message, showing the filename of the project you are trying to open.
If you get this error message then please update to the latest version of LINKPlanner, which is freely available from https://support.cambiumnetworks.com/files/linkplanner .
We apologize for the inconvenience.