The GUI installation fails with message:
Not a valid APM database
<DB Host> has APM database of older version
CA APM v10.7
Windows server 2012 R2
GUI install - using "GEN500000000000802"
Per engineering, the customer is performing the installation of 10.7 using "Existing Schema" which means it uses the schema of the older version (in this case 10.1.x version). In this case, if the latest version if 10.7 APM has changes related to schema, then the functionality might not work as expected using 10.1.x schema.
Per engineering , installer we should point to the current release schema when “existing schema” option is selected. Only when we select “Create or upgrade schema” option we can point to older version schema
Select "Create or Upgrade" Database or Manually Upgrade Oracle Database