User guide

145
Troubleshooting
●Q. Windows XP/2000 displays a “Hardware Installation” or “Digital Signature Not Found”
dialog box
• Did you make “Driver Signing Options”?
In order to install/re-install the driver, you must make the settings described in “Driver Signing
Options.” (Windows XP ➝ p. 22, Windows 2000 ➝ p. 26)
Problems related to the USB driver (Macintosh)
●Q. USB indicator on the VariOS's panel is not lit
The USB indicator will not light if the VariOS is not recognized by the computer. Please check the
following items.
• Is the USB cable connected correctly?
Make sure that the VariOS and your computer are correctly connected by a USB cable.
• Did you install the VariOS OMS driver correctly?
Install the VariOS OMS driver using the procedure described in “Installing the VariOS OMS driver”
(p. 40).
• There may be a conflict with the driver (Extension) of another USB device.
Use the "Extensions Manager" control panel to disable unneeded extensions.
From the "Selected Set" popup menu, select "Mac OS Base," and restart your Macintosh. Then install
the VariOS OMS driver once again using the procedure described in “Installing the VariOS OMS
driver” (p. 40).
●Q. A message of "Drivers needed for the USB device “VariOS” are not available.
Would you like to look for these drivers over the internet?" is displayed
• It is possible that the VariOS's USB MIDI driver has not been correctly installed in your computer.
Correctly install the USB MIDI driver as described in “Installation” ( “Macintosh users” (p. 35)).
• It is possible that there is a conflict with the driver (function extension) of another USB device. We
are aware of a problem that causes the VariOS to not be recognized correctly if a driver for I-O Data
Corporation's USB CD-R drive is installed. In this case, disable “ISD 200 BOTBridge” or other
driver file by moving it out of the Extensions folder, located within the system folder.
●Q. When the computer returns from the Sleep state, an indication of “MIDI off line!”
appears
• The VariOS's USB MIDI driver does not support the Sleep functionality of Mac OS. Do not use the
Sleep functionality of Mac OS. When you use the VariOS, open the “Energy Saver” control panel and
specify “Never” as the period of inactivity before the system goes to sleep.