Blender crash when render only on one project

Hi!

Blender crash every time I try to render one scene. Few days ago it rendered fine. Ive been trying to track down whats causing the crash. I can’t find out what it is.
Im using Mac, and Im rendering with Vray.
It seems that the rendering never starts in vray, so the crash happens in Blender.

i dont know if I should post this here, but if it helps I got the crash report here:

Blender 2.76 (sub 4), Commit date: 1970-01-01 00:00, Hash unknown

backtrace

0 blender 0x0000000100be24ea BLI_system_backtrace + 58
1 blender 0x000000010012c14d blender_crash_handler + 365
2 libsystem_platform.dylib 0x00007fff8bf0852a _sigtramp + 26
3 ??? 0x000000011f588c78 0x0 + 4820864120
4 blender 0x00000001009d4d05 RNA_property_pointer_get + 213
5 blender 0x00000001009da76f RNA_pointer_get + 159
6 blender 0x00000001005d31d2 _ZN9VRayScene16VRayNodeExporter11getNodeTreeEN2BL9BlendDataEP2ID + 114
7 blender 0x00000001006287ff _ZN9VRayScene4Node15GetMaterialNameEP8MaterialRKSs + 79
8 blender 0x0000000100629756 _ZN9VRayScene4Node15GetNodeMtlMultiEP6ObjectSsRSt3mapISsSsSt4lessISsESaISt4pairIKSsSsEEE + 2454
9 blender 0x000000010062a05e _ZN9VRayScene4Node13writeMtlMultiEP7_object + 110
10 blender 0x000000010062c5a9 _ZN9VRayScene4Node9writeDataEP7_objectPNS_14VRayExportableEb + 105
11 blender 0x00000001005c9dec _ZN9VRayScene14VRayExportable5writeEP7_objectf + 268
12 blender 0x00000001005aaa46 _ZN15VRsceneExporter10exportNodeEP6ObjectRKN9VRayScene9NodeAttrsE + 1254
13 blender 0x00000001005a5469 _ZN15VRsceneExporter12exportObjectEN2BL6ObjectERKN9VRayScene9NodeAttrsE + 1049
14 blender 0x000000010059f0a7 _ZN15VRsceneExporter16exportObjectBaseEN2BL6ObjectE + 10519
15 blender 0x0000000100598aa3 ZN15VRsceneExporter11exportSceneERKiS1 + 2051
16 blender 0x0000000100580158 ZL12mExportSceneP7_objectS0 + 104
17 blender 0x000000010245f05c PyCFunction_Call + 220
18 blender 0x00000001024daea4 PyEval_EvalFrameEx + 26532
19 blender 0x00000001024df689 _PyEval_EvalCodeWithName + 3945
20 blender 0x00000001024d46de PyEval_EvalCodeEx + 78
21 blender 0x000000010243f98d function_call + 381
22 blender 0x00000001024169f1 PyObject_Call + 97
23 blender 0x00000001024db77a PyEval_EvalFrameEx + 28794
24 blender 0x00000001024df689 _PyEval_EvalCodeWithName + 3945
25 blender 0x00000001024dfe61 fast_function + 433
26 blender 0x00000001024da936 PyEval_EvalFrameEx + 25142
27 blender 0x00000001024df689 _PyEval_EvalCodeWithName + 3945
28 blender 0x00000001024d46de PyEval_EvalCodeEx + 78
29 blender 0x000000010243f98d function_call + 381
30 blender 0x00000001024169f1 PyObject_Call + 97
31 blender 0x00000001024db77a PyEval_EvalFrameEx + 28794
32 blender 0x00000001024df689 _PyEval_EvalCodeWithName + 3945
33 blender 0x00000001024dfe61 fast_function + 433
34 blender 0x00000001024da936 PyEval_EvalFrameEx + 25142
35 blender 0x00000001024df689 _PyEval_EvalCodeWithName + 3945
36 blender 0x00000001024d46de PyEval_EvalCodeEx + 78
37 blender 0x000000010243f98d function_call + 381
38 blender 0x00000001024169f1 PyObject_Call + 97
39 blender 0x00000001024db77a PyEval_EvalFrameEx + 28794
40 blender 0x00000001024df689 _PyEval_EvalCodeWithName + 3945
41 blender 0x00000001024dfe61 fast_function + 433
42 blender 0x00000001024da936 PyEval_EvalFrameEx + 25142
43 blender 0x00000001024df689 _PyEval_EvalCodeWithName + 3945
44 blender 0x00000001024d46de PyEval_EvalCodeEx + 78
45 blender 0x000000010243f98d function_call + 381
46 blender 0x00000001024169f1 PyObject_Call + 97
47 blender 0x00000001024db77a PyEval_EvalFrameEx + 28794
48 blender 0x00000001024df689 _PyEval_EvalCodeWithName + 3945
49 blender 0x00000001024dfe61 fast_function + 433
50 blender 0x00000001024da936 PyEval_EvalFrameEx + 25142
51 blender 0x00000001024dfde0 fast_function + 304
52 blender 0x00000001024da936 PyEval_EvalFrameEx + 25142
53 blender 0x00000001024dfde0 fast_function + 304
54 blender 0x00000001024da936 PyEval_EvalFrameEx + 25142
55 blender 0x00000001024dfde0 fast_function + 304
56 blender 0x00000001024da936 PyEval_EvalFrameEx + 25142
57 blender 0x00000001024df689 _PyEval_EvalCodeWithName + 3945
58 blender 0x00000001024d46de PyEval_EvalCodeEx + 78
59 blender 0x000000010243f98d function_call + 381
60 blender 0x00000001024169f1 PyObject_Call + 97
61 blender 0x000000010052d70d bpy_class_call + 1117
62 blender 0x0000000100abbb41 engine_render + 113
63 blender 0x00000001004ad805 RE_engine_render + 981
64 blender 0x00000001004c313c do_render_3d + 44
65 blender 0x00000001004c18b8 do_render_fields_blur_3d + 280
66 blender 0x00000001004c0a91 do_render_all_options + 353
67 blender 0x00000001004c0589 RE_BlenderFrame + 201
68 blender 0x00000001003ff15b render_startjob + 139
69 blender 0x000000010013e58f do_job_thread + 31
70 libsystem_pthread.dylib 0x00007fff99b339b1 _pthread_body + 131
71 libsystem_pthread.dylib 0x00007fff99b3392e _pthread_body + 0
72 libsystem_pthread.dylib 0x00007fff99b31385 thread_start + 13

Thanks in advance!