RFC_ERROR_INFO 
The structure
Syntax
typedef struct {char key[33] ;
char status[128];
char message[256];
char intstat[128];
} RFC_ERROR_INFO;
is returned by RfcLastError describing the last RFC error that occurred.
This structure is defined in SAPRFC.H.
key[33]
error code to identify the error
status128]
state of the RFC connection
message[256]
text describing the error
intstat[128]
internal description of the RFC connection