UI5 Approval - Missing OData Service TASKPROCESSING

Hi Experts!
We are implementing SAPUI5 HR renewal Services with NW 7.4 and EHP7.
When we execute the approval applicaton, we are facing the following error message:
The error log shows that the TASKPROCESSING Service is missing:
I've checked already the following help-document:
http://help.sap.com/erp_hcm_ias_2013_02/helpdata/en/53/c46f8fc17a45088235db354b070a6e/frameset.htm
We activated all the business functions. But indeed, the oData Service /IWPGW/TASKPROCESSING is missing (or at least not activated yet).
When I try to add this Service via /IWFND/MAINT_SERVICE, there is no search result:
How can we add / activate this service?
Thanks in advance!

Please advise if you are using this on portal or NWBC?
Looks of it you are using the portal, did you assign the correct portal and backend UI5 role?
did you check the ping to the BPM webservice ? does it work?
* note 1859438 Launchpad service generates relative URLs
* note 1864001 Resolving of system alias for launchpad service
(Help for error analysis)
* note 1875366 resolution of sm59 destinations in UI2-RunTime
Follow these steps:
Run Transaction SPRO
Run activity Manage SAP System Aliases under ODATA channel
Change system alias software version to /IWPGW/BWF
Now the service should run ,
Check in transaction /iwfnd/gw_client
Do GET on url - /sap/opu/odata/IWPGW/TASKPROCESSING/TaskCollection
The previous error should be gone
then send me the response and error log if exist.
If you see in this transaction a good response, then most likely the
server is configured and you can continue with the rest of the
Steps are
To use the Tasks by Draft, Tasks by Priority, and Tasks by Time lanes, make the following settings:
Maintain the settings in SAP NetWeaver -> -> Gateway Service Enablement -> Content -> Workflow Settings -> Maintain Task Names and Decision Options.
Activate the required OData services and configure the ICF nodes in your SAP NetWeaver Gateway system.
Note
For more information, see SAP Library for SAP ERP under SAP ERP Central Component -> Human Resources -> Personnel Management (PA) -> Personnel & Organization -> Landing Page -> Configuring the Landing Page -> Activating SAP Gateway OData Services, Configuring ICF Nodes, and Configuring the Task Gateway Service for Task Lanes.
The information on the required OData services and ICF nodes is also available in the Administrator's Guide for HR renewal <applicable release> or in the SAP ERP Installation Guide <applicable release>.

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>
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