After upgrading from AIX 5.2 to 6.1, a customer tried to run the lsof command (that's the command to list open files on the system) and came across this error:
The lsof was compiled for AIX 5.2.
The customer tried to run this lsof command from an application GUI.
The solution's obvious, right? Upgrade the lsof command to the version for AIX 6.1. You'll find the links to do that in the article at the end of the page.
However, that lsof upgrade already had been done, and when I logged in via... [More]