#-char used n 3Dmodel filename spoils initial IDW filename.
Steps to reproduce:
1. Create IPT with any volume element and save file with name 123#456.ipt
2. Create IDW and place base view of the model.
3. Press save and make sure initial name would be 123.idw (everything starting with first # would be cut off).
Minor but weird defect.
Accepted as reproducible on 2012 and 2014 releases.
Thank you for reporting this.
It seems this happens with other special characters (e.g. "%"),
and also reproducible when you save a presentation from an assembly.
I logged this as DID 1503290 into our product database and asked DEV to seek the cause.
Best,
-Sami Harada
Inventor Framework QA
Autodesk, Inc.
It could be a Windows limitation, not all characters are allowed in file names. Try remaining the file within Windows Explorer and see if the problem persists.