vmware-sysinfo uses various libs on the source machine to get info about it. Sometimes they are incompatible on unsupported sources. Run vmware-sysinfo manually, it will generate a log with more specific information inside.
There are 2 tar.gz with vmware-sysinfo in converter's directory - for 32 and 64 bit sources. Copy it, extract it and run vmware-sysinfo.sh.
HTH
Plamen