There are situations/circumstances where one runs/debugs a SSIS package in the BIDS/Visual studio environment, one would encounter errors. In the progress tab we can see what steps have been performed in the SSIS package and at time we see lenght error messages. The error messages tend to be not visible entirely in the Progress tab. This could make it difficult for one to understand what the message is and proceed with the debugging process. Here is a snapshot of the progress tab within BIDS.
This has helped me in lot of situation when i had to deal with sometimes cryptic error messages.