Jenkins is running on linux server with a slave on windows 7 (running as service using java web start method).
When running a job with "run an android emulator during build" ->"Run emulator with properties "
That is when the AVD is created on every build , then on the windows slave in
.android\avd\avd_namexxx\config.ini
it creates the following in my case :
*******
hw.sdCard=yes
hw.cpu.arch=arm
skin.name=800x480
skin.path=800x480
avd.ini.encoding=UTF-8
abi.type=armeabi-v7a
hw.cpu.model=cortex-a8
snapshot.present=true
hw.ramSize=1024
image.sysdir.1=system-imagesandroid-17defaultarmeabi-v7asdcard.size=150M
tag.id=default
tag.display=Default
*******
the property image.sysdir.1 is missing "\" characters and a line return character and therefore the emulator cant find the system-image file

This issue only occurs when I add the custom hardware property in the job config (see line above hw.ramSize=1024)