title: How to generate system alias in /iwfnd/maint_service?
body: <p>I have following problem:</p>
  <p>I created an app  and the according oData in frontend system. Everything worked fine. Then I was taught, that this was not correct and I have to create the oData in backend system.</p>
  <p>So I made this. I created just the same oData in backend system, created another service for the new oData in transaction /iwfnd/maint_service in frontend system, changed the data source in the manifest of my app, and everything seemed to work fine. To add the app to the launchpad I needed one (or two?) more services in transaction SICF (paths sap/bc/bsp/sap and sap/bc/ui5_ui5/sap). Those were generated automatically for my &quot;frontend-oData&quot;. As those weren't generated automatically in frontend system for my new &quot;backend-oData&quot;, I added them manually. This seemed to work as well. So I transported everything into quality system (the app from WebIDE to SAP was transported as &quot;updating an already existing application&quot;).</p>
  <p>And now my problem:</p>
  <p>Yesterday after transporting my app ran perfectly in just updated version. Today I get an error in quality system, that says:
  &quot;No systemalias for service 'ZEXAMPLE_SRV_0001' and user 'USER1234' found&quot; (I translated this error message from german). This error is new to me and I did not have this before. The settings for my &quot;frontend-oData&quot; were different ones (no systemalias &amp; service processing mode = &quot;Co-deployed only&quot;) and they were generated automatically.</p>
  <p>Now for my &quot;backend-oData&quot; in development system there is the setting &quot;Routing-based&quot; and the correct systemalias is maintained and the app runs perfectly there.  But in quality system there is no systemalias maintained. So I transported the systemalias from development system to quality system, but that didn't work, because the systemalias has to be a different one in quality system.</p>
  <p>I tried to make exact the same settings in quality system for my &quot;backend-oData&quot; as the &quot;frontend-oData&quot; has, but then in /IWFND/ERROR_LOG I get the message &quot;No service for namenspace /SAP/, Name ZEXAMPLE_SRV, Version 0001 found.&quot;</p>
  <p>So can anyone tell me the secret which step I need to do, that everything runs correctly again? I am desperated by now.</p>
  <p>Many thanks and best regards</p>