# Troubleshooting

This topic is divided into the following sections:

Input Issues

Output Issues

Program Issues

## Input Issues

>The Data Protection utility cannot redefine file filters specified using Sentinel LDK Envelope. You cannot add a file outside the scope of the file filter defined in the Sentinel LDK Envelope project of which the program is a part. Protect your software again using the new file filter settings.

>When adding a directory, the Data Protection utility detects and encrypts data files according to the filters set in Sentinel LDK Envelope. All other data files are ignored.

>Do not modify the following input data before encrypting an entry in the Main pane:

•File names

•File locations

## Output Issues

>Output directories must be specified carefully. Do not designate an output directory to be the subdirectory of the input directory.

>Check input file names and ensure the file name does not already exist in the output directory. For example, do not mark readme.txt for inclusion in the data file encryption process, then save the output to an output directory already containing an encrypted file with the same name.

## Program Issues

A displayed message may indicate that the data filters have not been specified for a program. In this case, you must protect (or re-protect) the program using Sentinel LDK Envelope—ensuring that you specify the required file filters.