AnhillPro build failed with RTC createSnapshot

We have AnhillPro tied in with the RTC 3.0 via a build definition.

As soon as we added 3 components to a previously successful build, and 2 artifacts to publish in the Anhill codestation, the build failed when fetching source code from the RTC via createSnapshot:

Scm:
An error has occurred. See the log file
C:\Users\rtc-build-dev.svc\AppData\Local\jazz-scm\scratch\0\.metadata\.log.
Caught: java.lang.Exception: Command failed with exit code: 13
at com.urbancode.anthill3.CommandHelper.runCommand(CommandHelper.groovy:50)
at com.urbancode.anthill3.CommandHelper.runCommand(CommandHelper.groovy:21)
at com.urbancode.anthill3.plugin.rtcscm.RTCHelper.createSnapshot(RTCHelper.groovy:220)
at rtc_scm_populate.run(rtc_scm_populate.groovy:11)
===============================

Our attempt to revert to the previous build by removing the additions was to no avail, the build still failed exactly the same way.

We also tried in vain to remove the suspected metadata log and started a new one.

ANY IDEA ?