This page will help you solve problems related to Execution Summary
Execution Summary gives the brief description of the execution after CMS analysis or CMS snapshots or both. If the analysis fails at the Execution Summary step ,issue is in processing Execution Summary feature.
For more information, refer to:
To get information about different log files, their locations and to understand and explore log files as per the feature,please refer to CAST Management Studio - Information - How to find logs