Navisworks General Discussion

Navisworks General Discussion

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Active Member
HankMerkel
Posts: 8
Registered: ‎12-02-2010
Message 1 of 10 (596 Views)

NavisWorks treating updated files as new in Clash Detective

596 Views, 9 Replies
05-14-2012 01:31 PM

Why does NavisWorks sometimes start treating updated files as new files in clash detective? Old clashes showing up as new clashes instead of showing as active.

New Member
agajbhiye
Posts: 2
Registered: ‎03-06-2012
Message 2 of 10 (591 Views)

Re: NavisWorks treating updated files as new in Clash Detective

05-14-2012 03:37 PM in reply to: HankMerkel

The best answer that I can give is that Navisworks has assigned a new Element ID to the objects in the updated files. Navisworks then sees the objects as entirely new and different objects than the objects involved in the old clashes, and it assumes the old clash was cleared and this one is different.

Active Member
HankMerkel
Posts: 8
Registered: ‎12-02-2010
Message 3 of 10 (580 Views)

Re: NavisWorks treating updated files as new in Clash Detective

05-15-2012 05:54 AM in reply to: agajbhiye

Is there a way to fix this? Either on my end or the detailer end.

*Expert Elite*
dgorsman
Posts: 5,506
Registered: ‎10-12-2006
Message 4 of 10 (576 Views)

Re: NavisWorks treating updated files as new in Clash Detective

05-15-2012 07:41 AM in reply to: HankMerkel

This can depend on the source files and what is done to "update" them.  Some software doesn't modify the object but instead erases the original and adds a replacement.  This might also result from exporting to NWC, again depending on the product.  From the user's point of view the components are only modifed but as noted technically its a new object and will produce a new clash.

 

I've looked at the issue as well and I can't really come to any other solution which allows for Navisworks to uniquely identify any object as being the same, even if it is replaced.

----------------------------------
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Adopt. Adapt. Overcome. Or be overcome.
A good question will be halfway to a good answer.


Active Member
HankMerkel
Posts: 8
Registered: ‎12-02-2010
Message 5 of 10 (573 Views)

Re: NavisWorks treating updated files as new in Clash Detective

05-15-2012 11:35 AM in reply to: dgorsman

I use dwg files and overright the coordination files each week. Is there a way to up this to Autodesk to see if it can be fixed of get a work around?

Alumni
john.lipp
Posts: 359
Registered: ‎08-28-2009
Message 6 of 10 (545 Views)

Re: NavisWorks treating updated files as new in Clash Detective

05-17-2012 09:51 AM in reply to: HankMerkel

Hi HankMerkel,

Are there resolved clashes listed with missing items in the Item 1 or Item 2 boxes of the results tab that correspond to these newly found clashes?  This would suggest that the item from the old clash is no longer identified by navisworks, and therefore are missing from the result which resolves the clash.  A new clash result is then created with the item that has the new identification.
 

Are you deleting files and appending new versions in Navisworks?  If you delete a file any clash results that have items from that deleted file are lost.  Even if you were to append the same file back in, the items would be missing from the Item1 or Item2 panels in the result. 

If you are simply overwriting the file, the results should remain unless the item in the model is modified in such as way that it is no longer identified by Navisworks as the same item.  Some lisp routines that modify items delete them and replace items with new ones.

If you check the entity handles of the items that no longer show up as results and are resolved in the two versions of the DWG, are they the same?  You can view the entity handle value by selecting the item in Navisworks and checking the Entity Handle tab in the properties window.

If you open both the previous version and updated version in Navisworks, select both items in the selection tree, and click Tools > Compare, it should show you the differences in the file.   Are the entity handles different for the same items in the file? If so, this suggests that the items were replaced and their identifiers used in Navisworks no longer exist in the updated version.


Best regards,



John Lipp
Support Specialist
Product Support
Autodesk, Inc.

Active Member
HankMerkel
Posts: 8
Registered: ‎12-02-2010
Message 7 of 10 (542 Views)

Re: NavisWorks treating updated files as new in Clash Detective

05-17-2012 10:04 AM in reply to: john.lipp

Item 1. No they are the same

Item 2. No I over-Wright to old dwg file with a new one, that way it keeps the same name and location.

Item 3 Yes the entity handles are the same.

Item 4 Can not do as I over-Wright the files with new ones so the coordination model stays updated at all times.

 

I am a General Contractor pulling models in from my subcontractors.

Alumni
john.lipp
Posts: 359
Registered: ‎08-28-2009
Message 8 of 10 (538 Views)

Re: NavisWorks treating updated files as new in Clash Detective

05-17-2012 11:02 AM in reply to: HankMerkel

Hi HankMerkel

For Item 4, you stated that you can’t check this because the files are overwritten. Do you have the older versions of the DWG files or is a matter of them having the same filename?

If you open a new session of Navisworks and rather than open the NWF, if you append both versions of the DWG and run the compare checking only for differences of Unique ID and have the “Save each difference as a set” is there an unmatched set listed?  Are the items in the sets the same items that are appearing in the new clash results?

Would you be able to log a support request through the subscription center linked below and I’ll have a look at the DWG files to see what the differences are that may be causing the issue?
http://subscription.autodesk.com/sp/servlet/public/index?siteID=11564774&id=11607975

Best regards



John Lipp
Support Specialist
Product Support
Autodesk, Inc.

Active Member
HankMerkel
Posts: 8
Registered: ‎12-02-2010
Message 9 of 10 (537 Views)

Re: NavisWorks treating updated files as new in Clash Detective

05-17-2012 11:07 AM in reply to: john.lipp
Do I need a case number? ________________________________ The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged or contain trade secret or proprietary information. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please reply to the sender and delete the original message or any copy of it. ________________________________
Alumni
john.lipp
Posts: 359
Registered: ‎08-28-2009
Message 10 of 10 (535 Views)

Re: NavisWorks treating updated files as new in Clash Detective

05-17-2012 11:14 AM in reply to: HankMerkel
HankMerkel

If you create a support request, it will generate a case number. In the support case, you can send me the files through the support request rather than having to post them on this public forum. 




John Lipp
Support Specialist
Product Support
Autodesk, Inc.
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