ZBrushCentral

Out of disk space on ZB4 launch

We gave full permissions to zbrush app folder and to sharing. We are a school and use default users. When logging in as default, zb launches fine. When students login in as active directory users, we get the error message.
Anyone know why this would be happening? Tia.

We have tried the permission solution offered on this forum The actual default (local) user account under which Zbrush first open works fine. But any other user including other local accounts get the out of disk message. Our macs have 12gb ram and at least 161gb unused disk space. We use Deep Freeze which does not seem to effect the default account from working. When zbrush opens, on most machines the icons on the bottom part of the screen do not appear.

Anyone? Thanks.