Installing a hotfix jar file and getting EM not found error

Document ID : KB000095578
Last Modified Date : 11/05/2018
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For a hotfix that consists of a jar file to be run on EM.  The following command was tried first:
<EM root>\jre\bin\: java -jar <EM root>\APM10.5.2.88XHF.jar 

This results in EM not found.
Please run the jar file from the EM root directory:
eg. jre\bin\java -jar APM10.5.2.88XHF.jar 

As a result, the hotfix folder is created under <EM root> with the appropriate hotfix version.