elem.Category.Name in Linked file - Crash !

[ppathak]

Hi All,

I am trying to get the "elem.Category.Name" from a linked .rvt file when the program crashes with the following exception:

"Attempt to modify the model outside of transaction."

I am not trying to assign any value to it, just trying to get the info. In fact it crashes even if I just do:

If NOT (elem.Category is Nothing) then
'Get the name
End If

Everything works fine on the primary document (ActiveDocument).

Any help is greatly appreciated !

Prashant

[mmason.65315]

Any time that you query or modify a model, you really need to do it inside of a Transaction within Revit.

When you're working on the Active model, Revit makes a transaction for you automatically (for convenience) so that you don't have to do it explicitly.

When your command starts working on other models, however - there is no "automatic" transaction.

You have to explicitly wrap what you're doing with:

Document.BeginTransaction()


Document.EndTransaction()

Then I think everything will work fine for you.

Best Regards,
Matt

[ppathak]

Document.BeginTransaction()


Document.EndTransaction()

Then I think everything will work fine for you.

It really does... ! I should have listened to you earlier

Anyways, Thanks a bunch !

Prashant

[info.159673]

hey...this solved my problem too!!!!!!!!!

woo hoo!!!!!!!!

[pfaudler]

Hi Matt,

Any solution for this for Revit 2012?
I have a code that I wrote in Revit 2010 using doc.BeginTransaction() and doc.EndTransaction(). I would like to use it in Revit 2012 but can't convert it to 2012 comliant. It throws transaction error message.
Any help would be much appreciated.
Regards