Ensure that parameter docDir is set in your converter:
<ac:Parameter> <ac:name>docDir</ac:name> <ac:value>doc</ac:value> </ac:Parameter>
After a _successful_ conversion a directory named after the converter id, holding file index.html should be created in the directory specified with docDir, holding a conversion report.
The most important things are:
Rule invocation counters tell how many times each rule was used.
Section Forgotten XML tags lists XMLtags that are not converted. Possibly because they were overlooked and a corresponding conversion rule was not created.