exception handling in webdynpro

Hallo Harish,

look at Sample Application 'Error Messages and Error Support' (https://www.sdn.sap.com/sdn/developerareas/webdynpro.sdn?page=TutWD3_MessageErrorSupport.htm). You can find it in the 'Web Dynpro Sample Applications and Tutorials' section containing the Web Dynpro feature-to-sample-matrix.(https://www.sdn.sap.com/sdn/developerareas/webdynpro.sdn?page=webdynpro_tutorials.htm).

In addtion the NetWeaver Help contains a special section dealing with this topic: 'Web Dynpro'-'The Development Process' - 'Error Handling'.

You can easily find the relevant NetWeaver Help information by utilizing the sophisticated SDN search functionality: in the search form at the left side type in 'Web Dynpro Error Handling' and select 'help.sap.com' in the dropdown listbox.

The default trace file of your SAP J2EE Engine is stored in <Drive>\usr\sap\<System ID>\JC00\j2ee\cluster\server0\log with the name 'defaultTrace.trc.0'.

Greetings, Bertram

hi!Bertram!

Thanks for the reply.

But,our objective is to make the back end perform some validations and communicate with webdynpro and show the exceptions that arise due to invalid access or something like that which tell the user that he cannot perform the action and proceed further as his request is not valid.

these validations are performed in the backend(R/3) system and the result of the validation should be shown to the user in the webdynpro.

<b>this is our scenario:</b>

1. User/Initiator selects the PO Items for collaboration on the Inquiry UI Screen.

2. User clicks on the “Collab” button.

3. Validate if the Line Items selected are valid for collaboration. A selected Line Item is not valid for collaboration if:-

(i) It is already in collaboration. i.e the status of the Line item is marked “In Collaboration”

(ii) Item has been cancelled.

(iii) Event Management Status prevents collaboration.

<i><b>This validation is performed by a call from UI to the Services layer. Application Service – POCollaborationService -> Method: GetCurrentPODetails

If any of the items are not valid then an exception is raised and an error mes-sage will be displayed in the UI. The user than can unselect the invalid items and continue or cancel.</b></i>

please advise as of how to make the back end tell UI that there is an exception and prevent the user from proceeding further until he unselects some items which he cannot change or access

thanks in advance,

harish

HI! SAM!

can you please tell me the path in WEBDYNPRO where can i find the "IWD Window Manager" and also "IWD Message Manager."i hope these would be required.i could not find them in webynpro environment

thenks in advance,

harish.