Installing Erlang for Excel manually

In most cases, our downloadable Windows installers deploy the required files and prepare Excel to use our add-ins. Occasionally, they fail to configure Excel properly, and this page walks you through manually installing Erlang for Excel.

Erlang for Excel

Distributed as part of our Westbay Traffic Calculators product, this original add-in introduces eight Erlang functions that you can easily use in your workbooks to analyse your telecommunications trunk groups and estimate the number of call center agents you need at your inbound call center.

The Erlang for Excel functions are contained with an Excel add-in, permanently installed on your computer rather than being transported within workbooks, as is the case with macros. The installer file you downloaded on purchase (itraffic.exe) should configure Excel for you. You can check this using the self-test utility we install on the Start Menu (Westbay Traffic Calculators | Erlang for Excel).

Erlang for Excel installation test passed

If you see this green box, then Erlang for Excel installed correctly and is ready to use.

Installation test failed

Occasionally, the installation test will fail and you will see the following output from the self-test utility:

Erlang for Excel installation test failed

The most common reason for this failure is if you are trying to use the add-in from a different Windows account than the one that installed the software, because Excel’s configuration is stored per-user, not per-machine. We provide a simple applet on the Start Menu to make the necessary changes for the current Windows account. You can access this at: Westbay Traffic Calculators | Re-install Erlang for Excel.

Re-install Erlang for Excel applet

This applet will list the versions of Excel it detects. If your version is Excel is displayed, the configuration should be complete. You can confirm this by running the self-test again (see above) and, if the result is green, you will be able to start using Erlang for Excel. If the self-test still fails or the wrong version of Excel is detected by the applet, you should try and manually installing the Excel add-in.

Manually installing Erlang for Excel

If all else fails, follow these steps to manually install the Erlang for Excel add-in:

  1. Open the Excel Options box. The easiest was to reach this is through the File menu. Click it, and a sidebar will appear on the left. Click Options at the bottom of the list:
    Options
  2. On the left menu of the Excel Options box, click Add-ins. At the bottom of the box, select Excel Add-ins from the Manage drop-down box and click Go:
    Excel options
  3. The Add-in manager will appear. Press the Browse… button:
    Add-ins
  4. Using the navigation box, go to the C:Windows folder and find the add-in file: Westbay Traffic.xla. Select it and press OK:
    Navigating to the add-in
  5. This should return you to the Add-in manager, with Erlang for Excel (TM) displayed with a tick (check mark) against it:
    Excel Add-ins
    Press OK, and you will now be back in the main Excel window. Close Excel and restart it. Erlang for Excel should now be installed and ready to use. You can confirm this using the self-test utility described at the top of this page.

Additional licences

Please ensure that you are licensed to use Erlang for Excel. If you are not licensed and have not gone through the normal installation and activation process, the manual installation described on this page will not work.

Erlang for Excel is included with Westbay Traffic Calculators and costs $99 for an installation on a single computer. We also offer enterprise licences for multiple installations. This is a once-only payment and includes free upgrades for the lifetime of the product.

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