Hi,
Please check the Creator for the files under the mentioned directory should be <sid>adm and the Mode should be 777
This can be cross verified in the system as follows:
Logon to R/3 and from AL11-> DIR_PUT (/usr/sap/<sid>/SUM/abap), open "mem" subdirectory. Then choose any file under this directory and click on button "Attributes". Can you see the contents
Cannot open '/usr/sap/PID/SUM/abap/mem/XPRASUPGMOD.LST': No such file or directory
Thanks
Rishi Abrol