DR scene file errors

[stezza]

A collegue of mine is getting many error messages when sending off to render. The output log from RenderPal is...

[2010/Nov/18|13:03:27] V-Ray warning: Invalid geometric normal (-1.#IND -1.#IND -1.#IND) for "<unknown>".
Warning: Invalid geometric n[o2r0m1a0l/ No(v/-118.|#1I3N0 3-:12.7#]I NVD- R-a1y. #wIaNrDni)n gf rI n"va<liud ngkenoomwent>r"i.c
normal (-1.#IND -1.#IND -1.#IND) for "<unknown>".
Warni[n2g0:1 0I/nNvoavl/i1d8 |g1e3o:m0e3t:r2i7c] nVo-rRmaayl w(a-r1n.i#nIgN I-n1v.a#lIiNdD g-e1o.m#eItNrDi)c fnoorr m"a<lu n(k-1.#IND -1.#IND -1.#nIoNwDn)> "f.o
r "<unknown>".
[2010/Nov/18|13:03:27] V-Ray warning: Invalid geometric normal (-1.#IND -1.#IND -1.#IND) for "<unknown>".
Warning: Invalid geometric normal (-1.#IND -1.#IND -1.#IND) for "<unknown>".
[2010/Nov/18|13:03:27] V-Ray Wwaarrnniinngg:: IInnvvaalliidd ggeeoommeettrriicc nnoorrmmaall ((--11..#IND -1.#IND -1.#IN#IND -1.#IND -1.#IND) for "<unknown>".D
) for "<unknown>".
[2010/Nov/18|13:03:27] V-Ray warning: WIanrvnailnid geometric normal (-1.#IND -1.#IND -1.#IND) for "<unknown>".
g: Invalid geometric normal (-1.#IND -1.#IND -1.#IND) for "<unknown>".
[2010/Nov/18|13:03:27] V-Ray warning: Invalid geometric normal (-1.#IND -1.#IND -1.#IND) for "<unknown>".
Warning: Invalid geometric normal (-1.#IND -1.#IND -1.#IND) for "<unknown>".


Any ideas as to what the issue is to give us an idea of what to look at

Many thanks