Problem on Installation of SAP NW testdrive 7 on Linux!!

Hy, i have started the installation of SAP 7 Linux testdrive but i have received this message:

unpacking sqd_env.tar.bz2

bzip2: compressed file ends unexpectedly

peraphs it is corrupted)

bzip2: Inappropriate ioctl for device

Input file = (stdin). output file =(stdout)

It is possible that the compressed file have become corrupted.

After these messages the installation has continued with unpacking other tar file.

I try to open the sqd_env.tar.bz2 but the system has sad to me that the file is corrupted.

How can i resolve this problem?

Thank's a lot.

Sincerely yours,

Andrea Maraviglia