Process Composer displays the attributes in the simulation process.
If there is an error in the attribute file, such as invalid XML, the file is not imported from
the working directory. To allow you to determine the problem with the
attribute file, Process Composer does not clean up the working directory if the import fails. Similarly,
the attribute file is not be imported from the working directory if it
contains an expression in the result element. Error messages describing the
illegal expression are written to the execution log.