The following table includes common file types that TestStand creates and uses to save data.

Table 9. TestStand File Extension Descriptions
File Extension Description
.c C source file.
.dll Dynamic Link Library file.
.html HyperText Markup Language file. TestStand can use the HTML file format for test reports.
.ini Standard Microsoft Windows configuration settings file. Used to store most TestStand configuration information.
.llb LabVIEW library file.
.lvclass LabVIEW class library file. The class library file defines a new data type.
.lvlibp LabVIEW packed project library. LabVIEW packed libraries package multiple files into a single file.
.lvproj LabVIEW project.
.seq Sequence file. Sequence files are the files in which TestStand applications are written.
.tsaproj TestStand Sequence Analyzer project. Specifies the files to analyze and the rules and related settings to use during the analysis.
.tpj TestStand Project file. A project file can store and organize the set of files used in a TestStand application.
.tsd TestStand Deployment Utility deployment file. Contains the information to build a full deployment or a patch deployment.
.tso Workspace options file. TestStand saves information in this file to preserve certain user settings, such as window positions, source code control information, and the expansion state of the Workspace pane.
.tsr TestStand raw results file. Stores results in a compressed format for later processing.
.tsw TestStand workspace file. A workspace file can store TestStand project files.
.txt Text file.
.vi LabVIEW virtual instrument.
.xml Extensible Markup Language file. TestStand can use the XML file format for test reports.
.xsl Extensible Stylesheet Language file. TestStand uses these files to apply formatting to XML test reports.