Best Practices for LISSY

The LISSY system processes jobs (programs) sent by users, and returns listings (output) with results, usually within minutes. However, LISSY’s processing time can vary depending on the total number of job submissions at a given time and on the complexity of each job.

We recommend the following to avoid system congestion:

  • Send each job only once. If it is not returned, do not send it again.
  • Wait for each job to be returned before submitting your next one.
  • Certain program syntax and commands will trigger system security alerts and may interrupt traffic. To avoid causing traffic jams in LISSY, please do not request frequencies on continuous variables or use commands that violate our security measures. (See FAQs for tips on avoiding disallowed commands.)
  • Jobs that result in very long output may cause congestion in LISSY. Try breaking up the query into several smaller jobs. If you encounter difficulties repeatedly, please contact LIS User Support.
  • Debug your program before submitting a job to LISSY, especially if you are not familiar with statistical package syntax. Debugging can be done on your home computer by testing your jobs on our downloadable sample files.

ATTENTION: If your programs routinely congest the LISSY system, we reserve the right to put these jobs “on hold”. If the situation persists, LIS may temporarily suspend your account.