FAQs | NodeXL - Part 3

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We’ve written a comprehensive guide to installing NodeXL Pro. Read it here.

A self-loop is created when a vertex links to itself.
Self-loops appear as circles in NodeXL network visualizations.
The display of self-loops can be controlled via the “Visibility” column in the Edges worksheet.
To reveal the “Visibility” column select the menu item:
NodeXL Pro>Show/Hide>Workbook Columns>Visual Properties
In the Edges worksheet, each edge has a “Visibility” column.
In the “Visibility” column you can place a formula that checks if Vertex1 = Vertex2.  If so, the formula places a “0” (Zero) in the cell.  If not, the formula places a “1”.
“0” (Zero) = “Skip” (which acts as if the data has been deleted).
The Excel formula is:
=IF([@[Vertex 1]]=[@[Vertex 2]],0,1)
Then Refresh the graph and the self -loops should no longer be displayed!

NodeXL Pro allows for 3rd party developers to create data importers that can integrate into the NodeXL Pro > Data > Data Import menu. In that menu you will also find a list of links to 3rd party importers currently available.

Flickr limits access to their API on a per key basis. Your should stay under 3600 queries per hour or flickr may block or terminate your access.


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We’ve written a comprehensive guide to installing NodeXL Pro. Read it here.

A self-loop is created when a vertex links to itself.
Self-loops appear as circles in NodeXL network visualizations.
The display of self-loops can be controlled via the “Visibility” column in the Edges worksheet.
To reveal the “Visibility” column select the menu item:
NodeXL Pro>Show/Hide>Workbook Columns>Visual Properties
In the Edges worksheet, each edge has a “Visibility” column.
In the “Visibility” column you can place a formula that checks if Vertex1 = Vertex2.  If so, the formula places a “0” (Zero) in the cell.  If not, the formula places a “1”.
“0” (Zero) = “Skip” (which acts as if the data has been deleted).
The Excel formula is:
=IF([@[Vertex 1]]=[@[Vertex 2]],0,1)
Then Refresh the graph and the self -loops should no longer be displayed!

NodeXL Pro allows for 3rd party developers to create data importers that can integrate into the NodeXL Pro > Data > Data Import menu. In that menu you will also find a list of links to 3rd party importers currently available.

Flickr limits access to their API on a per key basis. Your should stay under 3600 queries per hour or flickr may block or terminate your access.

If you are publishing a paper that makes use of NodeXL we would be happy to feature it in our list!  Please see:

https://nodexl.codeplex.com/documentation

for information about NodeXL in research and education.

To cite NodeXL in your papers please use the following:

Smith, M., Ceni A., Milic-Frayling, N., Shneiderman, B., Mendes Rodrigues, E., Leskovec, J., Dunne, C., (2010). NodeXL: a free and open network overview, discovery and exploration add-in for Excel 2007/2010/2013/2016,http://nodexl.codeplex.com/ from the Social Media Research Foundation, http://www.smrfoundation.org

Issue: NodeXL will not install and displays:

The value of the property ‘type” cannot be parsed.  The error is: Could not load file or assembly “Microsoft.Offfice.Business.Applications.Fba.Version=14.0.0.0

To resolve this issue Right-Click the NodeXL Pro installation file and select “Run as Administrator”

There are several other possible solutions to this problem.  If these steps do not resolve the issue, please install TeamViewer and send a message with the Team Viewer ID and PW to info@smrfoundation.org and we will fix the problem as soon as possible.

Issue: NodeXL Crashes and displays “Object reference not set to an instance of an object”

A common cause for this issue is the location of the NodeXL Pro License key.
Delete the current NodeXL Pro license key.
Find the email that was sent with the initial NodeXL Pro license key attached.
Copy the NodeXL Pro License Key to the local file system. A good place is a folder created on the desktop called “NodeXL Pro”.
Restart NodeXL Pro. It will ask for the location of the NodeXL Pro License Key. Once that is provided, it should work properly.

There are several other possible solutions to this problem. If these steps do not resolve the issue, please install TeamViewer and send a message with the Team Viewer ID and Password to info@smrfoundation.org and we will fix the problem as soon as possible.

If this message shows up, you have reached the limits of your machine. Please take a look at the sytem requirements above.


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The use of NodeXL Pro Twitter data importers requires a twitter account. Before your first data import you need to authorize NodeXL by entering a token number which is automatically sent to you during the authorization process.

Moreover Twitter’s public free API has many limits. NodeXL Basic and Pro are both effected by these limits. Data is available only for 8-9 days. Queries cannot return more than 18,000 tweets.

The follower network is further restricted: the rate at which queries about who follows who can be asked is low.

NodeXL Pro does not enable the collection of data beyond these limits. That said, NodeXL can process data from commercial data providers (like Crimson Hexagon or Radian6). While these are expensive options, they may be the only way to get historical data from Twitter.

Commercial services like Radian6 and Crimson Hexagon might provide archival data – but not cheaply!

Please see: https://nodexl.codeplex.com/discussions/650609 and: https://nodexl.codeplex.com/discussions/649987

You may be able to get a little bit more data from the public Twitter API by using the SINCE: and UNTIL: operators – example:

QUERYTERM since:2016-01-21 until:2016-01-27

Since: and Until: operators scope the time frame of the query.

Twitter controls its API and throttles it based on unknowable parameters. We notice that the more the volume of tweets == less tweets delivered.

One alternative is to do day long slices and append them in order to maximize the data available from Twitter.

You may also be interested in this: http://graphserverimporter.codeplex.com which enables NodeXL to connect to the “STREAM” API from Twitter (which sometimes delivers larger volumes of data).

If you cannot find the original license key in your emails, please send a short note to info@smrfoundation.org with the exact email address you used when purchasing the license.

The original license key email is often sent within a minute of the order. If you do not receive a license key email promptly please check your “Spam” or “Junk” folders. You should also check to see the email address that you used to pay for your license key. In some cases the email associated with your payment is different from your main email address. If you cannot find the original license key in your emails, please send a short note to info@smrfoundation.org with the exact email address and the payment transaction ID used when purchasing the license.

You may run NodeXL Pro on any number of machines, but only one at a time.

The NodeXL Pro License Key file we send to you must be placed on any machine you would like to use to run NodeXL Pro.

Place the NodeXL Pro License Key file anywhere on the target machine’s file system.

When NodeXL Pro opens, it will ask you to locate this License Key file. This will then authorize the use of NodeXL Pro on that machine.

When a machine is authorized for NodeXL Pro all other machines that are running NodeXL Pro are de-authorized. NodeXL Pro will not operate on these machines until one of them is re-authorized.

To re-authorize a machine, copy the ORIGINAL license file (the one attached to the license email) to the target machine. DO NOT use the license file from any other machine.

When a license file is authorized, the copy of the license file is imprinted with machine specific data that prevents it from running on any other machine.

Only the original license file can (re-)authorize a machine.

NodeXL Pro requires:

OPERATING SYSTEM: Microsoft Windows ™(XP, Vista, 7, 8, 10)

SOFTWARE: Microsoft Office™ (2007, 2010, 2013, 2016)

64 bit versions of Windows and Office are recommended (32 bit systems cannot use large amounts of RAM).

RAM: More the better! 4GB is enough to handle very small networks, 8GB for medium networks, 16GB or 32GB is recommended for very large networks (100K edges and above).

CPU: Most computers are now fast enough to handle network calculations. That said, faster CPUs are good for improving NodeXL’s performance. However, currently NodeXL is a (mostly) single threaded application that does not make use of multiple cores.


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We’ve written a comprehensive guide to installing NodeXL Pro. Read it here.

A self-loop is created when a vertex links to itself.
Self-loops appear as circles in NodeXL network visualizations.
The display of self-loops can be controlled via the “Visibility” column in the Edges worksheet.
To reveal the “Visibility” column select the menu item:
NodeXL Pro>Show/Hide>Workbook Columns>Visual Properties
In the Edges worksheet, each edge has a “Visibility” column.
In the “Visibility” column you can place a formula that checks if Vertex1 = Vertex2.  If so, the formula places a “0” (Zero) in the cell.  If not, the formula places a “1”.
“0” (Zero) = “Skip” (which acts as if the data has been deleted).
The Excel formula is:
=IF([@[Vertex 1]]=[@[Vertex 2]],0,1)
Then Refresh the graph and the self -loops should no longer be displayed!

NodeXL Pro allows for 3rd party developers to create data importers that can integrate into the NodeXL Pro > Data > Data Import menu. In that menu you will also find a list of links to 3rd party importers currently available.

Flickr limits access to their API on a per key basis. Your should stay under 3600 queries per hour or flickr may block or terminate your access.