INV 2008 Fold Command Causes Crash

[jweiss1313]

We are experiencing a problem with the Inventor Pro 2008 (SP1&SP2) crashing when using the sheet metal fold command. The command works fine when folding at a bend angle of 90 Degrees. When you select a bend line and try to type in a bend angle other than 90, Inventor crashes. We are using a work around that involves entering the bend angle prior to selecting the bend line and it works for all bend angles of 30 degrees and greater. Any angles less than 30 degrees causes Inventor to crash. I've been able to reproduce this error with the Inventor bend table, the k factor and our SPI bend table. I have multiple CAD users experiencing this problem now. Is anyone else having this problem and If so, is there a fix for this problem?

John Weiss
CAD Administrator
Follett Corporation

Dell Precision 490
XP (32 bit) SP2
NVIDIA Quadro FX3450
4 GB RAM

[mflayler2]

Can you attach a non-confidential sample with these settings for the community users to test?

[Anonymous]

Hi John,

This problem is part specific so we would need your part to investigate it.
Can you please post it? If you don't want to post it on this forum you can
send it to me at harold(dot)lee(at)autodesk(dot)com.

Thanks,

Harold Lee
Inventor QA

[jweiss1313]

Here is a copy of a test sheet metal part that crashes during the fold command.

[jweiss1313]

Here is a copy of the Inventor Bend table that SPI created for this part.

[jweiss1313]

I've submitted a Technical support request to SPI sheet metal and they responded as follows:

thank you for reporting this to us.
We had a look in the problem and found out that this it is in deed bug
of Inventor itself.
Our application makes no more or less as to create an Inventor bend table
from our bend factors and add this to the sheet metal style.
So this can be done by any use manually with the same fatal results.

We have started a support request at Autodesk too. I will inform you
when we get more information from them.

In the meantime you can avoid that difficulty if you add angle
values (one near to 0 and one near to 180) to the SPI material database tables.
The problem is, that if an angle is not in the area defined in the
shortening values, then Inventor crashes.

[mflayler2]

Well I got it to work with my Bend Table and Kfactor just fine. I would agree with the SPI answer that it is a problem with their k value and bend table in regards to Inventor's API.

[Anonymous]

John,

Thanks for the part and reporting the problem. I think SPI has the correct
take on the problem. On a good note, it looks like some work has been done
recently to improve this. I tried your part in my in-development version
and it did not crash. I will make sure this issue is in our database.

Thanks again,

Harold