Update: The fix was deployed during May 19 Downtime.
Clients are not able to use mm* commands to manipulate GPFS ACLs on most OSC systems, due to a security vulnerability for GPFS. We will deployed a fix on datamover nodes (sftp.osc.edu) later, so if you need to run mm* commands, please log into sftp.osc.edu. We will deploy the fix on other systems during May 19 downtime.
For more information about the security vulnerability for GPFS, please see this page: https://www.ibm.com/support/pages/node/6151701?myns=s033&mynp=OCSTXKQY&mync=E&cm_sp=s033-_-OCSTXKQY-_-E