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Location CPIC, Service '?' unknown, Hostname unknown (Unicode ERROR), Installed Languages

RfcOpenConnection failed (RFC_COMMUNICATION_FAILURE): LOCATION CPIC (TCP/IP) on local host with Unicode ERROR partner '?' not reached​

Possible Cause: IP-adress/Host wrong​

The IP-adress or the hostname is misspelled.

Recommendation​

Check the hostname and adjust if necessary.

Possible Cause: Wrong instance number​

The instance number of the SAP system was misspelled in dab Nexus.

Recommendation​

Check and adjust the instance number in dab Nexus.

Possible Cause: Problem with network connection​

There is a network problem and the SAP system cannot be reached.

Recommendation​

In this case, your IT team/SAP team can help you. They can check and rectify the cause. Afterwards you can test the connection again.


RfcOpenConnection failed (RFC_COMMUNICATION_FAILURE): ERROR service '?' unknown​

Possible Cause: SAP system is missing in the services file​

The entry for the SAP system is missing in the services file.

Recommendation​

Connections to the SAP system can be established via Dispatcher, Gateway or Message Server. Each of them has a defined TCP/IP range starting from 00 to 99 (this represents the instance number of the SAP system, xx in the following list).

  • Dispatcher 32xx
  • Gateway 33xx
  • Message Server 36xx

Add the SAP system in the services file (Default path: %windows%\system32\drivers\etc\services).

You must insert the entries as follows:

  • sapdp 3200/tcp, sapdp 3201/tcp, sapdp 3202/tcp, ...
  • sapgw 3300/tcp, sapgw 3301/tcp, sapgw 3302/tcp, ...
Important

The file must be saved with a blank line at the end. If this does not happen, the entry in the last line will not be used and this error will still occur although the necessary entry is present in the file.


RfcOpenConnection failed (RFC_LOGON_FAILURE): Select one of the installed languages​

Possible Cause: Language is not installed in the SAP system​

The choosen language is not installed in the SAP system.

Recommendation​

Change the language to English in dab Nexus, this should be installed by default on the SAP system. Then test the connection again.