ProTools LE 7.4.2 Evaporates & Crashes On Playback

[1protoolman]

Hi,
Protools LE 7.4.2 Evaporates & Crashes without any error messages on playback:
Does anyone have the same problem?
I am running a Digi 002 firewire rack, Mac Lepoard OSX 10.5.4, Intel Mac 2.4,with 4GB. of ram
I performed a Clean uninstall and reinstall of PT LE 7.4.2.
Removed all prefs. with Protool Pref & Database Helper, emptied trash.
Ran Apple Disk Utility,& restarted.
Checked the Digi wed site for ProTools 7.4.2 problems.
Tried all the above many times!
Contacted Plug-in manufacturers,made sure I have downloaded the latest. Plug-ins for Lepoard,OSX 10.5.4.
Removed 3rd. party plug-in to the Digi unused plug-ins folder.
Ran just Digirack plug-ins. Crash,crash: eek:
PT 7.4.2 still crashed again, with only Digirack plug-ins.
Made sure my Apple HD is Mac OS Extended (Journaled).
Made sure my Lacie d2 500,Quadra was Mac OS X Extened (Journaled).
I cannot record or playback.
I am open to any & all suggestions.
Pulling the hair out of my head for weeks.
Thanks

[Phil Ogden]

You should run the hardware test (from the OSX disc) to see if that throws anything up. Faulty RAM can cause problems such as this.

http://www.myspace.com/philogg

[1protoolman]

I ran the hardware test and everything is ok.
Replaced the firewire to the Digi 002 rack.
The light on the rack is lit and not blinking.

[brentf]

Would you happen to have your FW cable plugged into the front of your Mac? The only way I can get PT to play back on my 2.8 8-core w/mbox pro II is to use a FW port on the back of the computer. The front port causes PT to puke up either low-CPU or buffer-underrun errors. Weird.

You could also try toggling the clock input to SPDIF (expect an error) then back to internal. Sometimes the hardware just needs a slap up 'side the head.

[Scott Goldberg]

Check the post above. Using an external HD usually fixes these problems and it's always the best way to save and retrieve your data while working. GOod luck.