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500 function module "/iwfnd/fm_micro_hub_request" not found. when calling backend

Hi all,

We have configured a GW + Backend scenario and performed the configuration steps as described in SAP guides to communicate SAP Gateway to the ERP backend.

When trying to test a service, for example


An HTTP 500 error is raised, and in the details we can see:

500 function module "/iwfnd/fm_micro_hub_request" not found.

As far as I know, /iwfnd/fm_micro_hub_request function module should not be in the backend, since all backend components have already been installed (IW_BEP, mainly)

Could you please help?

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2 Answers

  • Posted on Oct 18, 2018 at 11:56 AM

    Hi Francisco,

    the function module /IWFND/FM_MICRO_HUB_REQUEST is indeed called in the backend as described in the blog of my colleague Manikandan .

    Reason is that you try to use the "OData on Backend" Scenario which requires SAP NW 750 SP04 at Minimum on both the hub and the backend as I have described here.

    So remove the "OData on backend" or "Mirco hub" flag from your System alias Definition.



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  • Posted on Oct 19, 2018 at 09:13 AM

    Hi Andre,

    Thank you very much for your prompt response. I removed the "OData on backend" option and it worked perfectly.

    By the way, I read a few days ago your Quick Guide for gateway connection, it's a great help, very clear.

    Thanks again for your help!



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