This has been seen with Type III Meridien cards and Pro Tools/AVoption|XL 5.1.3 and earlier software. Digidesign began shipping Type III Meridien boards with AVoption XL systems around June of 2002. Previously, Type II cards were included.To run AVoption|XL with a Mix or D24 system, it is required that the AVoption|XL 5.3.1 installer be run. Specifically, the file Meridien24p.dll 5.1.3r2 must be installed in the System Folder/DAE Folder/Video Engine Folder, and the file SCRP0101.abf must be installed to the System folder/DAE/Video Engine/SupportingFiles/Drivers folder. If an AVoption|XL 5.3.1 installer is not available, these files can be downloaded from digidesign.comThese components are also backwards compatible with Meridien II cards so there is no harm in installing them if you think you may have an older card.The version of Avid System Test that ships with AVoptionXL 5.0.1 - 5.3.1 does not support the Meridien type III cards and thus, fail to initialize the card at launch. An updated version of Avid System Test will be made available in the future.