Hey Julia,
1. Please upload the SAPup.ECO file or the error excerpt from the file.
In the above file you will also see the environment variables that are set when the "tp -V" command is being executed.
Bear in mind your error from your initial posting "no such file or directory"
2. I see that when you've listed permissions for the libsapnwrfc.so file that it's a sym link. Where does this sym link point to and what are the permissions of the file it points to ?
3. ldd libsapnwrfc.so will show you if the file is loadable
KR,
A.