Autodesk Inventor

[#1]

I open my assembly and get this prompt."The material referenced in the sheet metal rule could not be located....."

There are several sheet metal parts in this assembly, so I am not really sure which part it is talking about.  Would be good if it listed the part number so I could correct it. So I am off to find the one that is causing the trouble.  I close my iam and open the first sheet metal part, no dialog box, so I assume its not this one. Close it, and open the next one.  No dialog box, so I open the next one..... I continue this until I have opened all the sheet metal parts in this assembly and NONE show me the dialog again.... huh!!  That was yesterday. 

I come in this morning, start Inventor and open one of the sheet metal parts from yesterday and immediately get the dialog again.  The problem is that this dialog will only appear ONCE per Inventor session.

Once I nailed down the offending part, I then tried to find the offending material. I dont really know what this dialog is telling me cause the materials for the rules are stored locally in the part.  Why is it even trying to reference a material in the library?

Windows 7 x64 -12 GB Ram
Intel i7-930 @ 2.80ghz
nVidia GTS 250 -1GB (Driver 301.42)
INV Pro R2013, Update2
Vault 2013

[#2]

I get that same message when an assembly is opened immediatley after starting Inventor. I close the assembly without saving and reopen it and everthing opens fine. Maybe the material library is slow to load.

[#3]

I had the same problem, it is you sheet metal style rules is corrupt.
I solved it this way, open a new sheet metal part, save all the sheet metal rules to this file.
use the software "Autodesk Inventor style library manager".
go to the sheet metal rule and delete the styles. Go back to the sheet metal file and save
sheetmetal rules to style library.

René J

[#4 · Accepted solution]

I was using SP1 (the one that was pulled). I uninstalled it and then reloaded Update2.  I don't see the message now when I open the same sheetmetal part.