Only small section of the model is processed by the slicer

I’m printing from an obj exported from z brush, quite new to both softwares.
The model is relatively complicated and a pretty large file (130mb).

When I go to preview the print it only shows about the first quarter and then the preview finishes. Tried starting a print but the estimated time was the same as the preview so obviously wasn’t going to print the full model.

I assume I’ve missed something basic any advice appreciated.

try the repair model feature maybe? the common issue is problems with the mesh

Thanks Bjorn,

I think it must have been a bug, the same issue was happening with basic polygon models too but I’ve downloaded the software fresh and it looks like it’s going to work. I’m working on a different machine now, my personal laptop rather than my institutions imac.