I ran it from the command line instead of the console, and this revealed the problem:
$/opt/lotus/notes/latest/linux/aclhelp: error while loading shared libraries: libstdc++.so.5: cannot open shared object file: No such file or directory
I searched for that library and it doesn't exist on my servers (I tried two of the same). However, when I installed aclhelp on my Mandrake 9.2 server, then it would run without this problem. Could it be that it was compiled with a compiler that is later than the libraries installed on platforms such as Redhat 7.2? I know that 7.2 seems like it is a bit ancient given the speed at which Redhat moves along, but AFAIK ND6 is not supported on versions of (e.g.) Redhat above 7.2 or SuSE 8.3.
When I couldn't get Aclhelp to work yesterday I went to the Sandbox to see what was on offer there. And, as far as I can see, nothing comes even close to it. Thanks for producing something such a great piece of software.
I will have a go and see if I can compile it myself for Redhat 7.2