I had the same problem. Then, I created all the blocks in one AutoCad file, ensuring the block was inserted into the file.
In a block feature, import blocks and import the dwg with all the blocks inserted in the CAD file.
This worked. You can then select one of the blocks in the file.
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Stephen Moore
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Original Message:
Sent: 03-30-2017 23:42
From: Heinz Peter Lichtenberg
Subject: Re: Blocks and Symbols in FDM not importing
In ACAD they not defined as blocks in your files. You have to create blocks with ACAD or TBC and than you will be able to import them.
Pete