Error recovery plays a very crucial role for the convenient and efficient operation of the TCAD environment. A number of error modes can be selected from to determine the behavior of the framework on the occurrence of errors. The options include halting execution of all framework operation, halting the affected run, automatically retrying the erroneous step for a specified number of times, and ignoring the error condition. Furthermore, great care has been exerted to design framework modules as fault tolerant as possible. As a consequence, the user is liberated from almost all manual interference on errors and malfunctions; even after a crash in full operation the session can be resumed by just restarting the framework.