How do I fix the error: “RFC error occurred, RFC_COMMUNICATION_FAILURE / ERROR service sapgwxx unknown”

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If you are using ERP-Scale on a machine which does not have the GUI installed, the SAP gateway services might be missing from the PC’s services file.

To fix this, locate the services file on a PC with SAP GUI installed. The services file is normally located in folder \WINDOWS\system32\drivers\etc and is named services.
In this file are many entries starting with sap (e.g. sapdp00 and sapgw00). Copy all these entries into the services file on the other machine.

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