Attempt to run the map when the .\queue1 queue is empty. Because there are no messages on the .\queue1 queue, the adapter will wait for three seconds. After that, it will issue a warning. Because the input card MSMQQueue setting for the Source > Transaction > Warnings map setting is Fail, the warning will cause Map5 to fail with the message Source not available. If you change the Warnings setting to Ignore, the map will run successfully.