To resolve this check the RFC Destination in sm59 in the SAP system:
Go to transaction sm59 in the SAP system.
Select the TCP/IP connection.
Select the connection used.
Select the Special Options tab
Select non-Unicode .
More Information
This error was seen when attempting to load data into an SAP BW system from a using PowerCenter 7.1.x.PowerCenter 7.1.x does not support the Unicode setting checked within the RFC Destination screen in the SAP system. When attempting to write Unicode data,the datawill be processed correctly as Unicode data.
The RfcWaitForRequest is an SAP RFC SDK API call. If can fail because of some issues with network communication between SAP and Listener.
To resolve this issue, do the following:
Go to RFC Destination using transaction SM59 and perform the connection test
Ensure that the Gateway settings match the settings that the SAP system communicates