Well, (maybe some interesting informations for modders/developers/users) after some more hours of "sniffing" the actual status quo: - *Shame* on us, we play on Linux-DMP-Server by "dsonbill" - Sooo, i set up "mono" on my remote linux-box to start original DMP-server - Copied the /Player- and /Universe-folder to that places - Original-DMP-Server reported all vessel-files are damaged (maybe the vessel-files are not compatible between mono- and native linux-version?) - Moved Player/Universe-folders away from Linux-DMP-server-folder and started from scratch - Result: in folder /Universe/Players the server generates .txt-files for some (not all) Modifications - There is an TSTxxxx.txt-file generated from/for the "TarsierSpaceTechnology"-mod. - Deleting this file let me login again, bypassing "vessel sync error"! - File will be generated again, error re-appears - I login to linux-box and delete file as an actual workaround Meanwhile everything beside that runs very fine… ! - In the release-thread of "TarsierSpaceTech" (december 4th, page 38, post 372) was posted a "-fix recompile 4.5c-patch1" (Galaxy-fix?), i will try/test this tonight if error-behavior still exist, and drop a short msg later. So, stay tuned for the next episode Kerbal of Interest.