Hi Gerd, Both changes are fine by me. The "Invalid mapname" message I had put as a warning only because of the preceding comment "Although its not necessarily wrong for them to be zero, it probably (is a) sign that something is wrong" - I have no strong conviction about the severity, and it is probably a message no-one has ever seen. Cheers, Mike -----Original Message----- From: Gerd Petermann [mailto:gpetermann_muenchen@hotmail.com] Sent: 11 April 2021 16:08 To: Development list for mkgmap <mkgmap-dev@lists.mkgmap.org.uk> Subject: Re: [mkgmap-dev] More logging Hi Mike, I think MdxFile should use Logger.defaultLogger.error() and maybe LblFileReader should use Logger.defaultLogger.warn() (as in attached patch).. Just my feeling, can't prove anything. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Mike Baggaley <mike@tvage.co.uk> Gesendet: Sonntag, 11. April 2021 16:10 An: 'Development list for mkgmap' Betreff: [mkgmap-dev] More logging Hi Gerd, Here is the next patch. This one moves a number of messages from writing to stdout/err to using logging. There are several files changed, but most have only very small changes. I'd be interested to know what the message "Map has tide prediction, please implement" in LBLFileReader means... Cheers, Mike