
If you feel that this is happening in a dataset, do not delete the blocks after exploding them. Wen you have done that you will be able to explode the block to extract the linework into the project. Select all the linework in the Block Editor view and use the Convert to Linestring Command to convert all of the line types (CAD Lines, Polylines, 3D Polylines, Multilines etc.) to Linestrings. However if you see this issue today you can select the Block and right click and open it in the Block Editor. Trimble tells me that the tool that they use to work with DWG and DXF files is the cause of the issue (or the way that they are using it), and that they will try to fix it going forwards. If encountered the symptom is that you explode Blocks, and if you select Delete Blocks after exploding checked on, that the blocks disappear yet no linework at all is created.

The issue is caused by Blocks that have a line type called Multiline in the blocks. This issue came up last week and Trimble is trying to fix it at source, however we have a fix for this today as a work around.
