WorkInProgress.mo is missing from the package, or possibly has been left in the package.order even though it should not:
[/var/lib/hudson/slave/workspace/OpenModelica_UPDATE_LIBRARIES/build/FCSys 0.1/package.mo:2:1-1299:10:writable] Error: WorkInProgress was referenced in the package.order file, but was not found in package.mo, WorkInProgress/package.mo or WorkInProgress.mo.
WorkInProgress.mo is missing from the package, or possibly has been left in the package.order even though it should not: