ERROR: UDESymbolEngine: Symbol engine error !

What are reasons of this error message and how can I solve it? The message occurs, when

• the internal symbol database of the target application (*.out, *.elf) built by UDE is corrupted -> delete the corresponding *.sdf file, which is located near by the *.elf file
• the SQLServer Compact Edition is not installed -> reinstall it
• an unsupported debug format is used -> call PLS' support
• an unsupported compiler version is used -> call PLS' support