The issue is found during an installation of the SAP connector 5.8 for a system that is being upgraded from QlikView version 11.20 IR to 11.20 SR3: QlikView SAP Network Server "service" cannot be installed on the system "Failed to install service" error & Transports cannot be imported into SAP SAP Basis 7.301 is being used
The instance of the SAP system can be defined as an administrative unit which consist of different components that makes up the SAP system. The instance number specifies the last two digit of the four digit port address. The port address defines the address through which communication is made with the dispatcher of the specified instance. The first and second of the four numbers is 32 and it is fixed. The default for the instance number of a dispatcher is 00; hence, port number 3200 is assigned by default. Port number can be between 3200 and 3299. In a case where more than one instance running on a single host, the port address numbers 3200 and 3201 are assigned in that sequence for subsequent instances. It is worth mentioning that although by default, 3298 and 3299 are assigned to the nipping and saprouter program, it is possible to change this assignment.
This is configuration related, mismatch in the terminology on the SAP GUI and the QlikView SAP connector documentation. Instead of instance ID system ID shall be used.
In general during installation of an SAP system, there are numbers 1 -99 and to a port assigned by communication, shall be registered in a service file on the Windows,
and there are possible combinations sapgw00 to sapgw99 (unless it gets added manually) connected to a TCP (Transmission Control Protocol) port corresponding system instance No sapgw00 3300/tcp # SAP Gateway Port