If you are unable to launch Blackboard Collaborate with your .collab file, typically, either your operating system does not know what application to use to open this file, you have not installed the launcher or there was a problem when you installed the launcher.
Read the topics below, in order, to troubleshoot your issue.
- Confirm the Launcher is Installed
- Create a File Association
- Clear the Launcher's Java Cache
- Reinstall the Launcher