You're running the ReinstallationResourcesUtility tool but receive the following error as per the example below from a Linux system:
./ReinstallationResourcesUtility export /opt/Symantec/DataLossPrevention/EnforceServer/<version>/Protect /opt/EnforceReinstallationResources.zip
java.lang.IllegalArgumentException: File path must be a regular file at com.symantec.dlp.ReinstallationResourcesUtility.ZIPUtilities.addFileToZIP(ZIPUtilities.java:87) at com.symantec.dlp.ReinstallationResourcesUtility.ZIPUtilities.addDirectoryToZIP(ZIPUtilities.java:110) at com.symantec.dlp.ReinstallationResourcesUtility.ReinstallationResourcesUtility.exportReinstallationResources(ReinstallationResourcesUtility.java:123) at com.symantec.dlp.ReinstallationResourcesUtility.ReinstallationResourcesUtility.main(ReinstallationResourcesUtility.java:166)
You have subfolders (possibly backups from previous attempts) in the paths below:
/opt/Symantec/DataLossPrevention/EnforceServer/<version>/Protect/keystore
/var/Symantec/DataLossPrevention/EnforceServer/<version>/keystore
Remove any existing subfolders in keystore folders and re-run tool.