I mentioned the problem in a previous thread, but I can't find it anymore. Matt, you suggested I post a sample file.
I have a huge number of sonar logas that I can't import. Reefmaster throws and error about "unsupported SON file format".
I first thought it's the file size, because I usually got it for 3-7 GB files. But now I found files that I couldn't import, that were smaller.
Here is an example:
www.dropbox.com/sh/g5v0bvlp0nwzu76/AAAa1...gBnSpJj8e0Dgjna?dl=0

It reads fine in Humviwer...
Is the new version able to read the file?

New version of RM is able to read that file, because we now use the IDX (index) file when reading HB SON files. I will see if it is possible/feasible to include this in a maintenance release for RM1.

Do you know what exactly is wrong with the file? It seems that SonarViewer can not read it...

If you send an email to This email address is being protected from spambots. You need JavaScript enabled to view it. I will send you a small executable that cleans up HB files so that they can (usually) be imported into RM or the SV. The issue is likely just a single corrupted ping somewhere in the file that the current version of RM cannot recover from during import.