Hi! I develop an Eclipse plugin and I have a problem My code is the following one: String run_pelda = "cmd.exe /C pelda.exe"; Runtime pelda_rt = Runtime.getRuntime(); Process pelda_proc = javacheckgen_rt.exec(run_pelda); And after I would like to read the inputstream: InputStream toolstr = tool_proc.getInputStream(); InputStreamReader r = new InputStreamReader(toolstr); BufferedReader in = new BufferedReader(r); But my new Eclipse instsnce doesn't work. I think I should do it in java threads, but unfortunatelly I don't know to use it correctly. Please give me some ideas!