ABAP quick start Debug three ways
1、/H :Start Debugger
Normal Debug mode, executed from the beginning;
2、/HS :Start System Debugging
Distinguished from " / H " mode, only a part of the system will execute a program;
3、/HA :Start Debugging without Screen Handling
And " / H " pattern is similar, but is said to skip all of the Screen not Debug , but individuals feel the same.