Message type: E = Error
Message class:  XS - SAPconnect: All messages 
Message number: 070
Message text: Enter a valid RFC destination
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message XS070 "Enter a valid RFC destination" typically occurs when there is an issue with the Remote Function Call (RFC) destination configuration in the SAP system. This error can arise in various scenarios, such as when trying to execute a function module that requires an RFC connection to another SAP system or when accessing certain functionalities that depend on RFC destinations.
Cause: Invalid RFC Destination: The specified RFC destination does not exist or is incorrectly configured. Network Issues: There may be network connectivity issues preventing access to the target system. Authorization Issues: The user may not have the necessary authorizations to access the specified RFC destination. System Configuration: The SAP system may not be properly configured to recognize the RFC destination. Typographical Errors: There may be a typo in the RFC destination name when it is being called.
Solution: Check RFC Destination Configuration: Go to transaction code SM59 in the SAP GUI. Look for the RFC destination
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
XS069 Send times for priority & are invalid
What causes this issue?  You have entered invalid start and/or end times for priority &V1&.System Response  The entry cannot be stored.How to ...
XS068 Route from node & overwritten
What causes this issue?  You have entered the route (address area) &V2& &V3& in node maintenance for node &V4&. Up until now t...
XS071 Node &1 already exists.
What causes this issue?  The node <(>&<)>V1<(>&<)> already exists either as a communication node in the SAPconnect env...
XS072 Generic format '*' is not allowed when excluding formats
What causes this issue?  You have specified a generic format '*' and also choosen the option 'supports all formats except '.  This...
Click on this link to search all SAP messages.