Hi Darren,
Multiple add-ins can be installed in Excel. For us to check if this issue is about compatibility, we suggest removing Cognos Finance add-in and then install it again in Excel 2013. To do that, you may refer to the article below:
Add or remove add-ins
If the same issue will persist, it's best that you contact the developer of the add-in to verify its compatibility and for possible troubleshooting steps.
Keep us updated if you need further assistance.
Thanks for the update. I removed the add-in and reloaded this morning. At the final installation section , excel message appeared as follows: "Excel is running into problems with 'cfxl.com' add-in. If this keeps happening, disable this add-in and check
for available updates. Do you want to disable it now?"
If I do not disable, then excel opens but stops working and then reopens but asks to disable again. If I disable , I can get into excel but the add-in is disabled. If I try to manage the COM Add-In I can get it to active but it never appears on the Add-Ins
menu.
This has been the process behind the issue since I originally tried to load it