All of the tests from a specific client's project can be executed without any issues with Test Studio 2012.2.1204. After we upgraded the project to version 2013.2.1417, there are multiple compilation issues. The reason for these compilation issues is because some of the elements during the upgrade are moved under new page nodes, while in code they are still referenced under the previous page node. Steps to reproduce and the test project are attached in the internal description.