BPM error

Hi Experts

I have tried some scenarios involving BPM, but its giving error for each scenario, and error that persist is same for all the scenarios, PERMANANT ERROR IN BPE ( SYSTEM FAILURE) , and for one particular scenario that was file merging , once the error was regarding the mapping error , but i have checked that also its simple no user defined fucntion nothing else , mapping is also correct , but even then the error exist ,

please help here