Prerequisite scan detects missing prerequisites and the centralized agent update fails

You are centrally updating dynamic agents or fault-tolerant agents but the prerequisite scan detects missing prerequisites and the agent installation fails.

Cause and solution

The centralized agent update fails because the prerequisite scan detects missing prerequisites. In this case, analyze the prerequisite scan log file and solve the error, if any. You can then decide to rerun the installation or upgrade without executing the prerequisite scan. To do this, perform the following steps:
  1. On the master domain manager workstation, go to the directory where you download the fix pack installation package, or the eImage that you want to install on the agent. The default directory value is:
    On Windows operating systems:
    <TWA_home>\TWS\depot\agent
    On UNIX operating systems:
    <TWA_home>/TWS/depot/agent
    where TWA_home is the master domain manager installation directory.
  2. Edit the following script:
    On Windows operating systems:
    <TWA_home>\TWS\depot\agent\TWS1020_agent_platform_AGENT.zip\.self\selfupdate.wsf
    On UNIX operating systems:
    <TWA_home>/TWS/depot/agent/TWS1020_agent_platform_AGENT.zip/.self/selfupdate.sh
  3. In the selfupdate script, locate the twsinst installation command and add the -skipcheckprereq option. If you specify the -skipcheckprereq parameter, the twsinst script does not execute the prerequisite scan. For more information about the -skipcheckprereq option, see Agent installation parameters - twsinst script.