I’m new to RM and have created a project and added +25 logs to my lake project.
In a few places my newly created maps shows the wrong depth, I guess this is due to some short problem in my lowrance HDS unit. The lake is about 15m in the location, but my chart shows 50m in a small area.
I have located the faulty log and edit the log and deleted the faulty part.
But the faulty depth remains in my chart, have I missed something?

That should be all you need to do. Are you sure that you have removed all of the bad points and rebuilt the project? If you know, for example, that there should be no points over 20m then the easiest way to remove bad points is to use the depth filter. Decrease the bottom value to 20m and then click the filter button - this will remove all points outside of the filter range. You should then rebuild the map.

Thanks Matt! The filter solved all problems!