Use these instructions to get information of various Pack components installed:

Checking the version through Version.xml (on Engine and Client tiers)

You can check for Product version for ISPackForSAP (Pack for SAP Applications) and ISPackForSAPBW (Pack for SAP BW) in file Version.xml.  For example:
^{<Product version="8.2.0.0" productId="ISPackForSAP"/>}

This file is located in the InformationServer installation folder, for example, C:\IBM\InformationServer on Windows, /opt/IBM/InformationServer on Linux/AIX

Note that installing an Information Server FixPack after installing the Pack for SAP Applications overrides the Pack version recorded in Version.xml (Known Issue). For example:
^{<Product version="11.5.0.2" productId="ISPackForSAP"/>}

Checking the version displayed in the job log

The version is displayed in the job log as well, under Version Information entries (this includes the runtime patch level) for example:
^{Message: Delta_Extract_Stage_4,0: Version Info: VERINFO_PRODUCTNAME=IBM InfoSphere Information Server Pack for SAP Applications VERINFO_PRODUCTVERSION=8.1.0.1 VERINFO_BUILDNUMBER=333 VERINFO_BUILDDATE=2018-11-29_11:37 VERINFO_PATCHLABEL=RC2}

Checking the client version in GUI (Client tier)

SAP APP Pack Version information is available in stage GUI for all stages. You can access Stage->About tab to access VERINFO_R3PRODUCTVERSION and VERINFO_BWPRODUCTVERSION. You can access additional information on Build information and the patch used.

Check version of Engine Tier by using traces

You can check version of Engine Tier by capturing runtime traces. Check for VERINFO_R3PRODUCTVERSION and VERINFO_BWPRODUCTVERSION under Version Information message. These dev logs can be activated by using environment variable DSSAP_STAGE_RUNTIME_TRACE detailed in the environment variables technotes (SAP Applications and BW).

Check version of SAP Admin tool in GUI

Launch DataStage Administrator for SAP and click About to access VERINFO_R3PRODUCTVERSION.

Check version of ABAP Program generated

You can view the Pack version for a generated ABAP Program in ABAP Extract Stage. Go to Output -> ABAP Program -> Edit Program and check WA_VER-LINE, for example:
WA_VER-LINE = '8.2.0.0'

Check RFC Service functions version in use

You can view the installed RFC version in ABAP Extract and Delta Extract Stage GUI (the service functions deployed with the Pack):
ABAP Stage: Click Output -> General -> Validate Stage.
Delta Extract Stage: Click General -> Validate Stage.

Remote Function Module installed is the installed RFC version. For example, /IBMIIS/RFC_SERVICE_V8_2 and /IBMIIS/DELTA_EXTRACT_V8_2. In case this version is incorrect, review the installation instructions and repeat the process if necessary.