Can't run the Ethernet IP Capacity Tool? How to fix the missing mfc100.dll error

So you’ve downloaded and installed Rockwell’s Ethernet/IP capacity tool, but it won’t run?

Are you getting the below pup-up error which states, “The program can’t start because mfc100.dll is missing…”

Ethernet IP Capacity Tool Error

Well the good news is there is a pretty easy fix for this issue.

What you need is to install the Visual Studio 32bit redistributable package.

To get it, start buy navigating to the below URL:

Once downloaded, install the above package.

Once installed, you should now be able to open and run Rockwell’s Ethernet/IP Capacity Tool.

For more information about this tool, see our previous articles:

I hope you found today’s article helpful. If you have any comments, questions, or suggestions please don’t hesitate to leave them with us by filling in the “leave a reply” form at the bottom of this page.


Shawn Tierney
Automation Consultant
Insights In Automation

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