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The user interface add-on for SAP NetWeaver provides OData services through SAP Gateway. SAP Gateway offers extensive logging and tracing capabilities.

Use the SAP Gateway log viewer (transaction /IWFND/ERROR_LOG) to detect errors with SAP Fiori launchpad. You can filter the result list by namespace and service:

Table 1:
Namespace OData Service Description
/UI2/ PAGE_BUILDER_PERS Issues with SAP Fiori launchpad
/UI2/ INTEROP Issues with navigation from launchpad to application or between applications
/UI2/ TRANSPORT, PAGE_BUILDER_CUST, PAGE_BUILDER_CONF Issues with SAP Fiori launchpad designer

For more information about the logging and tracing capabilities of SAP Gateway, see Trace and Log Files in the SAP NetWeaver Gateway Technical Operations Guide.

On the front end, tracing of JavaScript code is done in the respective browser's JavaScript console.

For information on tracing in the SAP NetWeaver Business Client (NWBC), see How to Activate Tracing on SAP Help Portal at Start of the navigation path SAP NetWeaver 7.3 Including Enhancement Package 1 Next navigation step Application Help  Next navigation step SAP NetWeaver Library: Function-Oriented View  Next navigation step Application Server Next navigation step Application Server ABAP Next navigation step UI Technologies in ABAP Next navigation step SAP NetWeaver Business Client Next navigation step Troubleshooting End of the navigation path.