Hello,
I am getting the following Error in BC:

com.sap.mw.jco.JCO$Exception: (104) RFC_ERROR_SYSTEM_FAILURE: #MAIL nicht als Zahl interpretierbar
at com.sap.mw.jco.rfc.MiddlewareRFC$Client.nativeExecute(Native Method)
at com.sap.mw.jco.rfc.MiddlewareRFC$Client.execute(MiddlewareRFC.java:713)
at com.sap.mw.jco.JCO$Client.execute(JCO.java:2366)
at com.sap.mw.jco.JCO$Client.execute(JCO.java:2301)
at com.wm.pkg.sap.rfc.SAPSession.invoke(SAPSession.java:408)
at sap.map.outbound(map.java:84)
at java.lang.reflect.Method.invoke(Native Method)
at com.wm.app.b2b.server.JavaService.baseInvoke(JavaService.java(Compiled Code))
at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:716)
at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:473)
at com.wm.app.b2b.server.Service.doInvoke(Service.java:495)
at com.wm.app.b2b.server.Service.doInvoke(Service.java:392)
at sap.OutboundRFC(sap.java:212)
at java.lang.reflect.Method.invoke(Native Method)
at com.wm.app.b2b.server.JavaService.baseInvoke(JavaService.java(Compiled Code))
at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:716)
at com.wm.app.b2b.server.BaseService.invoke(BaseService.java:140)
at com.wm.lang.flow.FlowInvoke.invoke(FlowInvoke.java:292)
at com.wm.lang.flow.FlowState.invokeNode(FlowState.java(Compiled Code))
at com.wm.lang.flow.FlowState.invoke(FlowState.java(Compiled Code))
at com.wm.lang.flow.FlowState.invoke(FlowState.java(Compiled Code))
at com.wm.app.b2b.server.FlowSvcImpl.baseInvoke(FlowSvcImpl.java:1786)
at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:716)
at com.wm.app.b2b.server.BaseService.invoke(BaseService.java:140)
at com.wm.lang.flow.FlowInvoke.invoke(FlowInvoke.java:292)
at com.wm.lang.flow.FlowState.invokeNode(FlowState.java(Compiled Code))
at com.wm.lang.flow.FlowState.invoke(FlowState.java(Compiled Code))
at com.wm.lang.flow.FlowState.invoke(FlowState.java(Compiled Code))
at com.wm.app.b2b.server.FlowSvcImpl.baseInvoke(FlowSvcImpl.java:1786)
at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:716)
at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:503)
at wm.server.net.EmailTransaction$RunService.write(EmailTransaction.java:1375)
at wm.server.net.EmailTransaction$RunService.run(EmailTransaction.java:1244)
at com.wm.util.pool.PooledThread.run(PooledThread.java:109)
at java.lang.Thread.run(Thread.java:498)

Could someone help me on this issue?

Thanks,
Sujit