getElementsByClassName from Yammer causing Run-time error 91

Hi,

I am trying to get some information about Yammer groups. Using the video tutorial in the link below I have modified the code to get the number of members from a yammer groups page. I am getting the error message "Run time error '91': Object variable or With block variable not set". If I then click debug, and carry on running the program it works fine as if there was never an error. It also works if I put a breakpoint on the line "sMembers = Trim(Doc.getElementsByClassName("yj-count")(1).innerText)" and then step past it, it jsut wont run all in one go. Despite searching the problem I have no idea what the problem could be.

http://www.youtube.com/watch?v=7sZRcaaAVbg

The code I am using is:

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Thanks in advance for your help,

Regards,

Geraint

I think the page hasn't finished loading, at a guess the page is javascript heavy. You're getting the message since at the time you run the line of code, the page hasn't fully rendered, but by the time you have hit debug, it's finished rendering

You could make your code wait longer before continuing, I suspect that it would solve the issue

Thanks Kyle. Is there a way of making it wait until it's fully loaded, and isn't that what happens in "Loop Until IE.readyState = READYSTATE_COMPLETE"?

Not that I'm aware of, Readystate_complete is triggered when all the resources are downloaded. Since most javascript will use this as a trigger to begin execution, your code is running concurrently.

I suppose you could keep a doevents loop running and check for the existence of the class in the loop, once it's found exit the loop. Would that work for you?

Yes, that would work. How would I go about putting the check in, and would there be a way of putting a time limit on it as well so if for some reason the class never loads it won't get stuck in an endless loop? Perhaps something like the following?

LOOP UNTIL class exists OR timer = 15s

maybe something like:

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So close! Just using the Now > oNow part works but is obviously slow. When I add the "OR" check for the length > 0 i get the same error as before becasue the class doesn't exist to check it's length.

I think there's something else here Norie, that line will never return nothing - even if it doesn't match a class it will still exist - it will just have a length of zero.

Which version of IE are you running?

How would you loop to check if the document has finished loading? I'm only asking since I don't know how this would be possible - sure if it were a case of the DOM rendering from the initial call, READYSTATE_COMPLETE would be fine, but javascript which adds to the DOM executes after this event has already fired.

Despite my (admittedly limited) testing with the getElementsbyClassName method, I cannot get it to return nothing, even if the classes are not on the page - it returns an empty collection with a length of 0. I'm running IE10 on windows7, maybe it's different in earlier browsers, but it wasn't even available until IE9

Perfect! "Nothing" worked, I changed the line to the following:

HTML Code: 

Thank you both so much for your help.

Glad you got it sorted

Its oddv behaviour though, are you running ie9 out of interest?

Yes I am, IE9.

Thanks,

Ger