Weird error while impotrting a mesh...

So im pretty new to the Sims 4 modding community and ive tried to convert the 300 SL Gullwing from this site. So ive done everything like in this thread. Ive put on the same Cut in blender like in the file(black limousine toy car) which i wanted to replace (after exporting the meshes of the black limousine toy car). So ive done everything like i the tutorial but when i try to import the mesh it loads for a while and then gives me this error:




The Sims 4 Studio - Version 3.1.1.4
System.AggregateException: Mindestens ein Fehler ist aufgetreten. ---> S4Studio.Blender.BlenderException:
File "<string>", line 1, in <module>
File "<string>", line 14, in <module>
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\blender.py", line 387, in save_lod
save_mesh(blender_mesh,m, new_mesh,geometry_state)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\blender.py", line 290, in save_mesh
offset = vbuf.buffer.write_vertices(vrtf, sim_mesh_data.vertices, uv_scales, pos_scales)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\geometry.py", line 653, in write_vertices
self.write_vertex(vrtf, vertex, uvscales, posscales)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\geometry.py", line 722, in write_vertex
raise e
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\geometry.py", line 718, in write_vertex
self.write_element(declaration, data, uvscales, posscales)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\geometry.py", line 766, in write_element
self.writer.i16(val)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 219, in i16
self.i(data, 16, order)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 202, in i
elif size == 16: self.write('h', data, order)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 183, in write
self.f.write(struct.pack(l, data))
struct.error: short format requires SHRT_MIN <= number <= SHRT_MAX


bei S4Studio.Blender.BlenderUtilities.RunBlender(String script, String blend, Boolean background, Boolean check_version)
bei S4Studio.Blender.BlenderUtilities.ImportMlod(String fileName, String mlod, String rig, String state)
bei S4Studio.ViewModels.ObjectLodItem.ImportMesh(BlenderUtilities blender_util, String blender_path)
bei S4Studio.ViewModels.ObjectLodItem.<>c__DisplayClass48_0.<ImportMesh>b__0()
bei System.Threading.Tasks.Task.InnerInvoke()
bei System.Threading.Tasks.Task.Execute()
--- Ende der internen Ausnahmestapelüberwachung ---
---> (Interne Ausnahme #0) S4Studio.Blender.BlenderException:
File "<string>", line 1, in <module>
File "<string>", line 14, in <module>
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\blender.py", line 387, in save_lod
save_mesh(blender_mesh,m, new_mesh,geometry_state)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\blender.py", line 290, in save_mesh
offset = vbuf.buffer.write_vertices(vrtf, sim_mesh_data.vertices, uv_scales, pos_scales)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\geometry.py", line 653, in write_vertices
self.write_vertex(vrtf, vertex, uvscales, posscales)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\geometry.py", line 722, in write_vertex
raise e
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\geometry.py", line 718, in write_vertex
self.write_element(declaration, data, uvscales, posscales)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\geometry.py", line 766, in write_element
self.writer.i16(val)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 219, in i16
self.i(data, 16, order)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 202, in i
elif size == 16: self.write('h', data, order)
File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 183, in write
self.f.write(struct.pack(l, data))
struct.error: short format requires SHRT_MIN <= number <= SHRT_MAX


bei S4Studio.Blender.BlenderUtilities.RunBlender(String script, String blend, Boolean background, Boolean check_version)
bei S4Studio.Blender.BlenderUtilities.ImportMlod(String fileName, String mlod, String rig, String state)
bei S4Studio.ViewModels.ObjectLodItem.ImportMesh(BlenderUtilities blender_util, String blender_path)
bei S4Studio.ViewModels.ObjectLodItem.<>c__DisplayClass48_0.<ImportMesh>b__0()
bei System.Threading.Tasks.Task.InnerInvoke()
bei System.Threading.Tasks.Task.Execute()<---




If anybody can help i would be frickin satisfied!