If there aren't any files in the shared directory it does no good to try and run world, it will fail as you've seen.
Make sure you have a logs directory in your server directory, delete all files from the shared directory, then run shared_memory from a command prompt so you can see everything it outputs. Then, look in the logs directory to see if it wrote anything there.
Post the contents of the shared folder and any text it printed or wrote to a log file.
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