Unnamed error with Optimized Hot Spot Analysis, v 10.5.1

[StephanieDuce1]

Hi,

I am trying to run an Optimized Hot Spot Analysis in ArcMap version 10.5.1. This tool worked for me a couple of weeks ago but now there is an error icon next to the Input Features (screen shot attached) and no matter what input layer I select (projected/unprojected/shapefile/feature class etc.) the error does not go away. It doesn't provide details about what the error is when you hover or click the icon.

If I ignore the error and set the tool up to run as usual it gives the below error message with no details. 

Am I missing something obvious? Is version 10.5.1 no longer supporting this tool or something? Is it time for me to upgrade?

Any help would be appreciated.

Thanks,

Steph

[DanPatterson_Retired]

If it has worked in the past with the same or similar data, perhaps something has gone bad with your install.

From Windows Install/Remove programs, try a 'Repair' of the installation to see if that fixes it.

If not, you may need to 'reset your application profile'

last step would be an upgrade

[bradenmiller]

Having the same issue w 10.4.1.  I've run service packs, the install / repair, etc.  Nothing helps.

Windows 7 64-bit.