This was an integration setup of IBM Rational Integration Tester (RIT) with HP's Application Lifecycle Management (ALM) tool. Both RIT v184.108.40.206 and HP-QC v11 are installed on separate server machines.
Test Scripts from RIT was exported into QC successfully. When these test was run in the QC's Test Lab module section, the test should have ideally invoked the RIT application process and function the execution process. However, in this specific scenario, the test execution process resulted the following error:
ERROR: "Unable to start the tester process"
The entire RIT application was access via Citrix interface. It was confirmed that all the QC11 plugins were also reinstalled on the server as well.
QC11 Plugin Path : C:\Program Files\IBM\RationalIntegrationTester\tools\HP\QualityCenterServerDist11-client-only.zip
In-order to validate the intact of the integration setup, it allowed to add the test artifacts from the "Resource Selection" dialog window successfully. In a general scenario, When GHRunAgent.exe is called from Quality Center to execute an RIT test, the QC Test and QC Test Set are also available to the Run Agent.
The Run Agent then passes that data to RIT in one of 2 ways:
Method # 1 : If executed in the Legacy mode, it passes the QC Test/Testset to MercuryTest.exe via the command line which in turn passes it to the RIT
test execution process.
Method # 2 : If executed in the Running RIT mode, it passes the QC Test/Testset to GHTester.exe either via the command line (if RIT is not running) or an HTTP GET (if RIT is running). In Both cases, the values are passed directly to the execution process.
The remaining flow is the same no matter which mode (Legacy/Running RIT instance) that was used.
It was noticed that the previous GreenHat un-installation process did leave residual files of its own on the machine, due to which the RIT installation files did not picked up the appropriate executable correctly for the run made from HP-QC. A clean re-installation of RIT on the Citrix server did resolve this error.