Download TESSY 4.3
The latest version 4.3 of TESSY contains many new functions compared to TESSY 4.2:
The new mutation test feature automatically checks the error detection capability of existing test cases. This unique feature thus improves the verification of test methods and test quality, as required by functional safety standards (e.g. IEC 61508, IEC 62304, ISO 26262 und EN 50128), and significantly reduces the manual verification effort.
The “Test data pattern” function is used to check whether the interface is set correctly with regard to the passing direction of OUT variables. All test cases are automatically initialized with data patterns to ensure the independence of the test cases.
Both mutation tests and test data patterns can be optionally activated as additional test execution types within the normal test execution dialog.
The new TEE (Test Environment Editor) is directly and quickly accessible in TESSY with its own TEE perspective. Using its three views with filters and comparison options, the corresponding contents can be edited efficiently. Multiple environments can be compared and individual attribute values can be assigned to all selected environments. The overview of the development environments has been significantly improved by a grouping function for attributes and development environments can be configured in one step via UUID.
The coverage selection within TESSY 4.3 is based on the applicable standard for your development project (e.g. IEC 61508, IEC 62304, ISO 26262 and EN 50128). The recommended coverage measurements according to each standard are enabled by default.
TESSY frequently asked questions to compare TESSY 4 with former versions.
TESSY 4.3 software download
The new TESSY release with new features is available.
TESSY v4.3.9 setup
Release notes 4.3
TESSY user manual
The most current version with tips and tricks.
TESSY 4.3 User Manual Revision 43.007
Floating license server FLS
This is the standalone setup for the FLS and can be used for server installations without using TESSY setup.
FLS v8.2.5 (for TESSY 2.9/3.x/4.x)
2020-03-06: Added a Remote License Checkout feature
2020-08-07: Optimization for some rare network environments
2020-11-17: Minor optimizations
2021-06-30: Added support for Access Control Lists (ACLs)
Application Note: License Management Guide
Application Note: How to Update a Floating License Server from V7.x and V8.x to V8.2
System requirements: Windows 64bit
TESSY 4.3 system requirements
Windows 10 (64bit)
Windows 8/8.1 (64bit)
Windows 7 (64bit)
For documentation and test reports generation in PDF format please install a third party PDF viewer like Adobe Reader 7.0 or higher, Sumatra PDF, Foxit or else. (Windows 10 users please associate .pdf with your third party PDF viewer)
Hardware minimum requirements
CPU 2 GHz
RAM 8 GB
hard-disk 500 MB
Recommended hardware requirements
CPU 3 GHz
RAM 16 GB
hard-disk 2 GB
Important license information
Please note: You will need a new license to operate TESSY 4.3. Customers with a valid maintenance contract did already receive an updated license file. Customers without a valid maintenance contract have the possibility to request a time-limited evaluation license online after the installation of TESSY.
Evaluation license request for TESSY 4.3
TESSY requires a valid license to enable the software. You can request an evaluation license for TESSY 4.3 online after installing and starting TESSY.