Tiled exrs crashing 1.5SP1!

Hi I converted all my tifs to tiled exrs,

But with this version of Vray:

[2011/Jul/26|15:46:30] V-Ray: V-Ray for Maya version 1.50.SP1 from Jun 20 2011, 19:10:46
[2011/Jul/26|15:46:30] V-Ray: V-Ray core version is 2.00.01

It seems to be fatally crashing regardless of compression. Is this a 1.5SP1 limitation?