Problem: I can't connect to Blackboard Collaborate and I get the error message: "Unable to launch specified application - category: Invalid Argument Error." Solution: If you receive this error, your Internet browser cache is full and has no room for the temporary files created during the download of Blackboard Collaborate .jar files. To resolve this issue, clear your Internet browser cache. For step-by-step instructions with screenshots, see http://www.wikihow.com/Clear-Your-Browser%27s-Cache. If you still have questions, please contact DELTA's LearnTech help desk at: learntech@ncsu.edu (919) 513-7094