Hi all
Using Advance Steel 2020, I have built a lattice tower using AS angle steel. Creating a block of an antenna in a separate file, I used Polylines to achieve the basic shape utilising Plate at Polyline to ensure the component was AS legitimate. Hitting "I" (Import) to locate the antenna block and insert it into my primary model. I subsequently updated the separate block to include finer detail, and updated the original insertion of the antenna in my primary model using redefine. I noticed that editing the model was suddenly fraught with oddities; copying a component and trying to rotate it saw both components, rather than the selected one item, being rotated. Similarly, when I used a Mirror command instead, the original item was deleted, even though Delete original was not flagged. I purged and audited the file and, assuming a computer session issue, saved the file, closed the programme and rebooted the PC. On reopening the file, all the AS components were missing and no amount of juggling would encourage them to return. All the layers are active, nothing has been isolated to be restored. I've never encountered this issue before. Anyone any ideas?
Many thanks.
Patrick