IStarting from Jenkins 1.653 with the same plugins versions we noticed that the ant command is created differently and it does not work with our configuration.

Add build step Invoke Ant with the following values:

Ant Version: ANT_1.9.4
Targets: -lib D:\ANT_1.9.4\ANT_libs Alpha.i
Build File: buildInstallers.xml
Properties:
iaPath=${InstallAnywhereLocation}
iaOutputDir=$WORKSPACE
iaMergeModulesDir=

buildView=$WORKSPACE
buildLogsPath=$WORKSPACE
installersPath=$WORKSPACE

1.652 - Command output
cmd.exe /C '"D:\ANT_1.9.4\bin\ant.bat -file buildInstallers.xml -DiaOutputDir=D:\JENKINS-WS\Alpha\workspace "-DiaPath=C:\Program Files (x86)\InstallAnywhere 2015" -DbuildLogsPath=D:\JENKINS-WS\Alpha\workspace -DiaMergeModulesDir="" -DbuildView=D:\JENKINS-WS\Alpha\workspace -DinstallersPath=D:\JENKINS-WS\Alpha\workspace -lib D:\ANT_1.9.4\ANT_libs Alpha.i && exit %%ERRORLEVEL%%"'

1.653 and 1.654 - Command output
cmd.exe /C "D:\ANT_1.9.4\bin\ant.bat -file buildInstallers.xml -DiaOutputDir=D:\JENKINS-WS\Alpha\workspace '"-DiaPath=C:\Program Files (x86)\InstallAnywhere 2015"' -DbuildLogsPath=D:\JENKINS-WS\Alpha\workspace -DiaMergeModulesDir= -DbuildView=D:\JENKINS-WS\Alpha\workspace -DinstallersPath=D:\JENKINS-WS\Alpha\workspace -lib D:\ANT_1.9.4\ANT_libs Alpha.i && exit %%ERRORLEVEL%%"

BUILD FAILED
Target "D:\JENKINS-WS\Alpha\workspace" does not exist in the project "TNMS Installers".