You are getting this or a similar error when choosing the JRE folder that your application uses:
Error: no 'client' JVM at `C:\Users\myuser\Desktop\jre\bin\client\jvm.dll'.
This indicates that this JRE does not contain the HotSpot client JVM while
jre/lib/i386/jvm.cfg has it configured first in the list of available virtual machines.
This message is actually just a warning from the JRE when executing
javaw.exe. (It is not a Squish message, although Squish just happens to start
javaw.exe to test something.)
Automating your application with Squish should work correctly despite this message.