Error Messages

Error: Cannot open file C:\ProgramData\Encom\IGRF.COF

When starting a new project and trying to identify the IGRF parameters by clicking on the IGRF map you may get an error stating that the IGRF.COF file is not present.

ModelVision looks for an epoch file every five years.  For dates 2015 and later it will look for the file IGRF.COF, which may not be updated in the ModelVision distribution folder. However you can get around this problem by changing the date back to 2014.9 or earlier.

We have found the following references to IGRF2015.


Tensor Research will continue to monitor the availability of the latest IGRF epoch. As soon as this is finalised and Tensor Research has acquired the new IGRF model, it will be incorporated into ModelVision.