Hi @FORESTWEBB @KevinGrootendorst1 and @Richard
Sorry that you are experiencing a problem. It sounds like you are all getting this failure to open map after running the Spatial Analyst Reclassify tool. Could you please send me (kkramer@esri.com) your .aprx files and indicate which map fails to open? We will have the team take a look to see if we find any commonalities between the project files which might help us understand the issue.
For others on the thread, we are interested in investigating your .aprx files as well. If you are experiencing this issue, please contact technical support
This way you'll be able to share your .aprx files with any relevant details that you might have such as whether Pro may have closed unexpectedly, or disconnected from a network location where the project is saved, when working with that project. It will be necessary to understand where these projects are saved as well so we can look for commonalities - folder on a network, cloud store such as OneDrive, and so on. All of this information should be included when submitting an .aprx file to technical support.
Thank you