Pro Audio Support

Q:
DAE error # -1 when trying to instantiate the MachFive plug-in with a MIX TDM Pro Tools system.
 
A:
If you receive a DAE Error # -1 when instantiating the HTDM version of MachFive on a TDM system, make sure to use the RTAS version.

MOTU is aware that the HTDM version of MachFive will result in a DAE error # -1.

TDM (Mix) and Pro Tools LE users (001, 002, 002R, MBox) should use the RTAS version. HD based systems (HD) can use either RTAS or HTDM. The advantage to HTDM is that it allows Mach-Five to be used in surround mode (if you have a surround equipped monitoring system).

(from digidesign.com)