In some occations Radio Mobile will show a warning.

Model warnings

Radio Mobile will display the flag (if it is non zero) next to the Pathloss value and in the details in the 'Radio Link Profile' and 'Radio link Details'.

These are the meaningsof the error codes (1 to 4)

1. Parameters are close to limits
2. Impossible parameters, default values have been substitued
3. Internal calculations show parameters out of range
4. Parameters out of range

For more information, have a look at the ITM model documentation http://www.its.bldrdoc.gov/pub/ntia-rpt/82-100/index.php