m1n1m3 Newbie Poster 20 posts since Dec 2010 Reputation Points: 0 [?] Q&As Helped to Solve: 0 [?] Skill Endorsements: 0 [?] 0 2 Years Ago Hi, Iv downloaded and installed RXTX library: -put files into java folder. -used eclipse / project / properties / java build path ... -also did the: eclipse / help / install new software... But when i add: import gnu.io.*; ... and run any example code, the classes are red lines. i guess... cant be found in gnu.io. also when i leave cursor after gnu.io and hit ctrl space the tooltips wont show with different class content. Thank you in advance!