# HOOPS Exchange 2025.1.0

## Technology Update

### Format Updates

Format | Updated Version
--- | ---
Parasolid | 14.0 (Export)
Solid Edge | 2025
SolidWorks | 2025

See File Formats for the list of all supported formats.

### Third-Party Libraries Updates

Below third-party libraries have been updated:

Library | New Version
--- | ---
libexpat | 2.6.2

For more information about package content, see Distributing Your Application.

### Platform Changes

HOOPS Exchange support has now been extended to Linux on ARM64 (ARMv8-A). The minimum supported OS is RHEL 8 with Devtoolset 9.

See our Supported Platforms page for details.

### Removal of `HOOPS_LICENSE`

As of HOOPS Exchange 2025.1.0, the automatic inclusion of the hoops_license.h header file from HOOPS Exchange headers has been removed. This change, first introduced as a deprecation in 2024.7.0, is now mandatory and in full effect.

Key Changes

- The `HOOPS_LICENSE` macro is no longer automatically defined unless hoops_license.h is explicitly included.
- Developers are required to explicitly include hoops_license.h, manually define the `HOOPS_LICENSE` macro, or pass the license key directly in their code when initializing HOOPS Exchange via the function `A3DLicPutUnifiedLicense()`.

To initialize HOOPS Exchange correctly, the `A3DLicPutUnifiedLicense()` function expects a C-string value containing your license information. You may either directly pass this value in parameter or explicitly include hoops_license.h to get access to the `HOOPS_LICENSE` macro.

For more details, please refer to our Initializing HOOPS Exchange guide and our /tutorials/environment-setup tutorial.

### Other Changes

- Added a new option `m_bReadEmptyAttributes` to be able to read attributes with empty value from Revit format.

## Documentation Changes

The documentation has been extended to provide a detailed overview of the recently introduced C# API. This new API layer enables developers to integrate HOOPS Exchange functionality using C# for enhanced flexibility and platform support.

For more information on this new API, please refer to the following resources:

- C# API Primer
- Runtime Platform Support (C#)
- C# Tutorials
- Example Codes

## Deprecations

The deprecated symbols have been renamed and moved to the new `A3DSDKDeprecated.h` header.

The `A3DSDKDraw.h` header has been removed. For more information, see Extending HOOPS Exchange.

## Package Changes

### From-the-vault package removal

The “from-the-vault” package which used to contain unsupported formats like Lattice XVL, has been removed from the standard delivered packages. If you are interested in those formats and require the package, please reach out to our Support team.

### DLL name change (Unix)

On Unix platforms, the name of HOOPS Exchange library files has changed to conform better to usual naming standards:

- GNU/Linux: `libA3DLIBS-25.1.0.so` is changed to `libA3DLIBS.so.25.1.0`. `libA3DLIBS.so` is still provided and is now a symlink to the new file name.
- macOS: `libA3DLIBS-25.1.0.dylib` is changed to `libA3DLIBS.25.1.0.dylib`. `libA3DLIBS.dylib` is still provided and is now a symlink to the new file name.

For more information about package files, see Distributing Your Application.

### New DLL for Evaluators

A new DLL called a3dttd.dll has been introduced in the HOOPS Exchange package. This DLL is a pre-requisite to initalize HOOPS Exchange with a trial license. The DLL is not required while initializing HOOPS Exchange with long term perpetual license. The DLL is used to collect telemetry data useful for improving user experience. More information can be found here.

## Fixed Bugs

Issue | Description
--- | ---
SDHE-22190 | Fixed issue with missing points in DWG file import
SDHE-22105 | Fixed issue in getting the File Units with the API A3DAsmModelFileGetUnit().
SDHE-22014 | Improved the import time required for Creo files with DXF elements
SDHE-21970 | Fixed issue with import time of specific CATIA part
SDHE-21917 | Fixed issue with PMI visibility in some configurations from SolidWork files
SDHE-21890 | Improved handling of hidden Creo bodies
SDHE-21839 | Improved support of Tolerance types in STEP Import
SDHE-21836 | Improved support of Tolerance types in STEP Import
SDHE-21787 | STEP PMI loading in TcVis (JT)
SDHE-21748 | Fixed lost status of surfaces in Creo
SDHE-21639 | Improved handling of hidden Creo bodies
SDHE-21509 | Issue with Attribute Loss During Exchange Parsing
SDHE-21230 | Fixed issue with lost Textures during GLB export
SDHE-20398 | Improved handling of hidden Creo bodies
SDHE-20139 | Improved algorithm to have accurate STEP file generation for a given ACIS file.
SDHE-19533 | Improved SAT to STEP file conversion.
SDHE-19048 | Improved SAT to STEP file conversion.
SDHE-18236 | Fixed issue in STEP export when similar material from JT files were merged.
SDHE-12337 | Fixed error while exporting SLW to SAT

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