Losing calibration?

Hi

I've calibrated 4 maps to see a tracklog (in a *txt file).
Everything was OK until I've decided to delete the txt file from the XExplorer and upload it again.
The track is visible but 100 mts away from the path in the map.

Why does this happens and how can I avoid it?

Thaks

Rui

Either:
you did not select the correct map datum when importing the *.txt file to TTQV
or
you did not select the right map-datum when calibrating the map in TTQV.

The Trackfile must be imported while setting the map-datum in the import dialog according to the map datum this file was written in.

The map must be calibrated setting the correct mapdatum the map was produced in.

There is no way around having this information at hand. No software can display the track correctly if this info is not known.

What area, what type of textfile, maybe send it by e-mail

OK, now it's OK.

I haven't pay attention to tracklog datum.

Thanks

Rui