When Retracting Solutions - SharePoint Admin Services Must Run on All WFE and APP Servers in Farm

Whilst trying to perform a simple task of retracting a solution or package from a SharePoint 2007 Web application.  There it showed an error in the retraction status.  In the Timer Job Status under Global Configuration section in the Central Admin, there will be an error entry for the solution's retraction.

After some digging around, it seemed like one of the root causes of the problem was that we have a WFE Server and an Application Server in the farm.  Even though the Application Server had served no Web Site, it was essential that the Windows SharePoint Administration Service is running.  If it is not, this type of action on the Central Admin Console do not fully run.

Anyway, started the service then in order to refresh the status.  We need to do into the Central Admin's  Global Configuration - > Time Job Definitions.  Remove the error job that is hanging there for the retraction.  Then use stsadmin in the 12 Bin drectory and run a 

retractsolution command 

stsadm -o retractsolution -name <solution name> [-url] <URL name>

or retractwppack command if it was a .cab file

stsadm -o retractwppack -name <name> -url <URL name> -immediate

and voila problem cleared.