OtrosLogViewer is a tool to analyse logfiles. If you choose a single Logfile to open, the application try to find the best parser for this file. But if you have more than one parser configured than fits on this file you cannot choose one. I created a patch to add a choice.
If no parser can parse the file a error will be displayed (translated)
If you open more than one logfile, for example in the merge logfiles dialog, the dropdown cannot show the correct parser, but in the next dialog show the possible parser in the table.