Roger: Did you by chance forget to give the compiler a destination: c:\DevMicro javac Welcome.java c:\devmicro Welcome Jim James M. Corbett Programmer / Analyst | Canada Revenue Agency | Agence du revenue du Canada 875 Heron Rd. Ottawa, On. K1A0L5 James.Corbett@xxxxxxxxxxxxx Telephone | Téléphone: (613) 941-1338 Facsimile | Télécopieur: (613) 941-2261 Government of Canada | Gouvernement du Canada E = MC² -----Original Message----- From: program-java-bounce@xxxxxxxxxxxxx [mailto:program-java-bounce@xxxxxxxxxxxxx] On Behalf Of Corbett, James Sent: February 8, 2011 15:09 To: 'program-java@xxxxxxxxxxxxx' Subject: [program-java] Java: Command Prompt Roger: Have you done the following: To make sure that Windows can find the Java compiler and interpreter; Assuming that the below is your default installation path for the JDK. Select Start -> Computer -> System Properties -> Advanced system settings -> Environment Variables -> System variables -> PATH. Then prefix C:\Program Files\Java\jdk1.6.0_23\bin; to the beginning of the PATH variable. James M. Corbett Programmer / Analyst | Canada Revenue Agency | Agence du revenue du Canada 875 Heron Rd. Ottawa, On. K1A0L5 James.Corbett@xxxxxxxxxxxxx Telephone | Téléphone: (613) 941-1338 Facsimile | Télécopieur: (613) 941-2261 Government of Canada | Gouvernement du Canada E = MC²