Sometimes while working on SAP system you all met with some critical scenario which needs solutions to get resolve. As like when you are working at proxy to proxy means at application A to B in synchronous mode. And you met with a problem that both applications A and B are running but application “A” get fault. In this case you have to take some essential steps to analyse the situation and resolve the problem you are facing.
In this critical situation you have to check that application “B” is down and application “A” get fault massage. Then after this you have to check if there is some error in sender proxy or not? You may check this using exception class CX_AI_SYSTEM_FAULT.
After checking error in sender proxy you have to take a look over the link poster in which you will fetch that there is a system error. And if you are confused to get this, you can take help of error codes. Then you will come to know that this error fault is displayed in application using attributes CODES and ERRORTEXT of the exception class. So it is recommended that you have to check system errors which are managed and documented centrally for all the systems.
After performing these steps you will come to know the way that how to resolve a fault massage when application system down.