ZBrushCentral

Problem with exporting an obj

Hello

I have a problem with the export of a Tool to obj in Zbrush.
The maps generated with xNormal and Substance Painter are buggy:

Shoe2_normals.jpg:
Shoe2_normals

Shoe2_occlusion.jpg:
Shoe2_occlusion

Shoe2_vcols.jpg:
Shoe2_vcols

They should look like this:
Shoe3_normals.jpg:
Shoe3_normals

Shoe3_occlusion.jpg:
Shoe3_occlusion

Can you tell me what went wrong?
Is this a common error?

Hopefully you can help me.

Thanks in advance