The workflow is configured to run on a grid. The master service process distributed a session that uses a parameter file to a worker service process. The worker service process needs to create a temporary parameter file in its $PMTempDir directory using parameter file information received from the master service process. However, the worker service process failed to create the temporary parameter file because the Informatica Services account or the operating system user in the operating system profile does not have write permission on $PMTempDir, or because the directory contains a file with the same name.