Error while setting input parameter for dynamic process - GP

Question

Hi All,
I am using CAF 7.1 GP.
Here I have to start a process dynamically and it is working fine.
But, when I tried to set value for input parameter of this process by
IGPStructure params = GPStructureFactory.getStructure(process.getInputParameters());
params.setAttributeValue("Val","MyValue");
( <b>Val</b> is the name of grouped input parameter ), it is giving
com.sap.caf.eu.gp.exception.api.GPInvocationException: Structure with name input and namespace http://wwww.sap.com/nw/eup/gp does not have an attribute with name Val and namespace null.
But no where I have mentioned http://wwww.sap.com/nw/eup/gp.
I dont have any structures in my input and output.
Here is my full code
       try
            IGPProcess process = null;
            IUser tl_user =UMFactory.getUserFactory().getUserByLogonID("fahad");
                 IGPUserContext userContext = GPContextFactory.getContextManager().createUserContext(tl_user);//, user.getLocale());
                 process =GPProcessFactory.getDesigntimeManager().getActiveTemplate("F5D76840A56F11DC983B001966243CAD",userContext);
                 wdComponentAPI.getMessageManager().reportSuccess("Title of process is "+process.getTitle());
                 IGPRuntimeManager rtm = GPProcessFactory.getRuntimeManager();
                 IGPProcessRoleInstanceList roles = rtm.createProcessRoleInstanceList();
                 int rolenum = process.getRoleInfoCount();
                 wdComponentAPI.getMessageManager().reportSuccess("Number is "+rolenum);
                 IGPProcessRoleInstance roleInstance=null;
                 IUser ho_User=null;
                 for (int i = 0; i < rolenum; i++)
                         wdComponentAPI.getMessageManager().reportWarning("Role Text is "process.getRoleInfo(i).getText()"  Role Name is "+process.getRoleInfo(i).getRoleName());
                         if(i==1)
                              ho_User = UMFactory.getUserFactory().getUserByLogonID("poornendu");
                              roleInstance = roles. createProcessRoleInstance(process.getRoleInfo(i).getRoleName());
                              roleInstance.addRuntimeDefinedUser(ho_User);
                              roles.addProcessRoleInstance(roleInstance);
                         if(i==2)
                              ho_User = UMFactory.getUserFactory().getUserByLogonID("fahad");
                              roleInstance = roles. createProcessRoleInstance(process.getRoleInfo(i).getRoleName());
                              roleInstance.addUser(ho_User);
                              roles.addProcessRoleInstance(roleInstance);
                 wdComponentAPI.getMessageManager().reportSuccess(""+process.getStructure().getItemCount());
                 IGPStructure params = GPStructureFactory.getStructure(process.getInputParameters());
                 wdComponentAPI.getMessageManager().reportSuccess("Title of process is "+process.getTitle());
                 <b>params.setAttributeValue("Val","MyValue");</b>                     
                 String pName=wdContext.currentContextElement().getProcessName();
                 IGPProcessInstance prInstance = rtm.startProcess(process,pName,"This process has been started using the GP public API",tl_user,roles,params,tl_user);
       catch(Exception e)
            wdComponentAPI.getMessageManager().reportException(""+e);
Can anyone help me on this.
Thanks,
Fahad Hamsa

Answer 1

Hi Experts,
I solved it myself.
The problem was, I have to make the input parameter as exposed. Thats all
Anyway, thanks for the support.
Regards,
Fahad Hamsa