Major Release Introduces two New Modules and more than 30 Enhancements

Paris, France - March 28, 2008 - ESI Group (ESIN FR0004110310), a pioneer and world-leading supplier of digital simulation software for prototyping and manufacturing processes, announced today the release of VA One 2007.5. VA One is the only complete solution for simulating the response of vibro-acoustic systems across the full frequency range. VA One seamlessly combines Finite Elements, Boundary Elements and Statistical Energy Analysis (SEA) in ONE model. This release of VA One introduces two new modules and includes more than 30 major enhancements.

The new ''VA One: Stress module'' is ideally suited for determining the failure of structural components exposed to harsh vibro-acoustic environments. Applications include simulation of acoustic 'qualification' testing for composite aerospace components and durability analysis for fixtures and connections. The module seamlessly interfaces with existing structural finite element codes and is fully integrated within the VA One solution process and environment. ''Ensuring that our structures survive the harsh environments encountered during launch and liftoff is essential to our missions'' said Ben Tsoi, Senior Dynamics Environmental Engineer at NASA's Jet Propulsion Laboratories. ''Using VA One we can now predict the dynamic stress, strain and force in key components. This will help us to ensure that our structures are qualified for the acoustic and vibrational environments encountered during launch and liftoff''.

The new ''VA One: Periodic Structure module'' is ideally suited for efficiently modeling the vibro-acoustic response of large aerospace, marine and rail structures across a broad frequency range. The module is the result of a 2 year research program carried out by ESI Group in conjunction with NASA Langley, Virginia Tech and Boeing Commercial Airplanes. The module is fully integrated within the VA One environment and is ideally suited for modeling composite aircraft fuselage constructions, isogrid fairings and extruded train floors.

VA One 2007.5 also contains more than 30 major enhancements such as new functionality for modeling perforated panels and perforated noise control treatments. This functionality expands the types of trim materials that can be modeled resulting in more accurate descriptions of sound package and interior noise in automotive, rail and aerospace applications.

''This new release further extends the analysis capabilities of our users and continues our commitment to the research and development of state-of-the-art methods for noise and vibration prediction'' said Phil Shorter, Director of Vibro-Acoustic Product Operations at ESI Group.

About ESI Group

ESI Group is a world-leading supplier and pioneer of digital simulation software for prototyping and manufacturing processes that take into account the physics of materials. ESI Group has developed an extensive suite of coherent, industry-oriented applications to realistically simulate a product's behavior during testing, to fine-tune manufacturing processes in accordance with desired product performance, and to evaluate the environment's impact on product performance. ESI Group's offer represents a unique collaborative solution with an open virtual engineering environment known as the Virtual Try-Out Space, enabling virtual prototypes to be improved in a continuous and collaborative manner while eliminating the need for physical prototypes during product development. The company employs over 700 high-level specialists worldwide covering more than 30 countries. ESI Group is listed in compartment C of Euronext Paris. For further information, visit www.esi-group.com.

Corporate Contact:
Phil Shorter
+1 858 350-0057
pjshorter@esi-group-na.com

Media Contact:
Dianne Bell
+1-612-554-1331
Dianne.bell@esi-group-na.com