DAE error -7400 while trying to access a plug-in within Pro Tools 6.0 on OS X. May also claim insufficient system resources, or that the plug-in is not installed.
This error is caused by permissions settings on the plug-ins not allowing specific users Read & Write access. To change permissions on a plug-in, locate it in /Library/Application Support/Digidesign/Plug-Ins/ Select the file and choose Get Info > Ownership & Permissions, click on the lock icon and enter your administrator password, then change the Group permissions to Read & Write Alternately you can drag and drop the plug-in from the PT 6.0 installer CD, however, this will not allow other User Accounts on the same system to use that plug-in. In the PT 6.0 CD-->application support folder-->digidesign folder-->plug-ins folder. Drag to the OS 10 hard drive-->Library folder-->Application Sup't folder-->digidesign-->plug-ins.