What can cause the appearance of an error message when updating
ProTool (Pro/Lite) V5.2 from SP2 to SP3?
At a level of about 35% completion of updating your setup aborts
with the message "Cannot process Ptreg.dat".
There are multiple different versions of the "PTREG.DLL" file on
Via "Start > Find > Files or Folders…" find all the
files with the name "PTREG.DLL" on your local hard disks. Delete
all them except the one in the ProTool directory.
The correct file must have the following properties:
"Version 22.214.171.124 of 04.08.2000 02:11"
You can have these file properties displayed by right-clicking the
"PTREG.DLL" file in the ProTool directory and selecting