Open PBT client FAQs Open PBT client launching error: "Unable to launch the application." What is the resolution? After clicking on the Next button .jsp file is downloaded to the client machine. How can I proceed further? Can I use standards inputs in my code? Which compiler has been used by CollegeLabs to compile C/C++ programs? Open PBT client launching error: "Unable to launch the application." What is the resolution? Click on the Details button on the error console a. Jar files are not signed by the same certificate... Steps you can try to resolve the issue: Open PBT client requires JRE 1.6.0_14 or above version. Check What version of Java are you using? Go to system Start -> Run -> javaws -viewer (or) Start -> Settings -> Control Panel -> Java -> General tab -> Temporary Internet Files -> View Remove Java Cache Viewer if any b. Cannot identify the type of assignment/test. Contact support. Exiting... Steps you can try to resolve the issue: allow the IP: 107.23.11.198 /107.23.19.34 in the proxy server Firewall settings - Set to Normal add the above IP address to the browser's trusted sites in the client machine Internet Browser - IE version 6.0 and above, any version of Mozilla, Google chrome Check your Browser's Custom Settings whether it is set to 'Medium'. You can change the Custom settings by Selecting Tools > Internet Options > Security > Custom Level > Reset Custom Settings. Check if your browser has JavaScript enabled. After clicking on the Next button .jsp file is downloaded to the client machine. How can I proceed further? Select the downloaded .jsp file -> right click -> Open With -> Java(TM) Web Start Launcher If there is no Java(TM) Web Start Launcher then click on Browse and select javaws.exe from the jre installed path Can I use standards inputs in my code? You should assign runtime values in the code itself. You cannot give standard inputs / command line parameters / console inputs like scanf(), getch(), getchar(), cin and other such commands will not work. Which compiler has been used by CollegeLabs to compile C/C++ programs? C/C++ programs are compiled using GNU Compiler. Key differences you should note: Include <iostream> instead of <iostream.h> Include the sentence "using namespace std" for standard outputs. There should be blank line at the end of the program