Debugging Data Flow in SQL Server Integration Services
You can save a lot of time by using the SSIS Troubleshooting tools. These enable you to work with reduced data samples, monitor row counts, use data viewers, configure error-handling and monitoring package execution. Although you can develop SSIS packages without them, it is so much easier once you're familiar with these tools.

When I check the length, I get these results:
A table name is limited to 128 characters. How does this work?