在执行SXMB_ADM->Integration Engine Configuration –>Check(F7)时报错，
“No access to system landscape at present”
Sldcheck 报错：
No corresponding business system found for system RET client 300
ð Check and maintain the SLD content for the current client
Sxmb_adm check 报错
No access to system landscape at present
解决办法：登录到SLD，把client 300 remove ,然后RET 系统里执行RZ70重新注册，
登录VA系统，重新发送SLD数据，然后重新创建business system
此配置一般在abap proxy配置时遇到。