Problems with MRI segmentation and electrodes coregistration

some polhemus files seems corrupted but it works with other

More details are needed. Please see my previous message.

bu as soon as i want to generate 3D tissues or BEM/MESH is stops.

What stops? How?
Please give more details and screen captures

this is the message that i get when i install cat 12

Please refer to the instructions in the tutorial:
https://neuroimage.usc.edu/brainstorm/Tutorials/SegCAT12#Install_CAT12