Corrupted Stack

[Richard Gaskin]

KOPP Ed wrote:
> I searched the archives, but didn't find the silver bullet I was looking
> for.
> 
> I've distributed a standalone stack (Windows) that calls another in the
> "splash screen" style. The second stack is my data stack and it's corrupted.
> It can no longer be opened by my standalone app. When I try to open this
> data stack directly from Revolution, I get a message "There was a problem
> opening that stack: stack is corrupted; check for ~ backup file."
> 
> Of course, there's no backup file. Is there any way to ignore the scripting
> and just retrieve the data that's stored in the various fields on the cards?

Hmmmm....we go seven years with close to zero corruption, and in the 
last two months I've read about three cases.  RunRev -- what's happening?

Ed, before you go down the arduous route of rebuilding the stack, you 
might try seeing if there's some way to delete any images in it first. 
In most cases corruption is related to images embedded in the stack, and 
it may be possible to delete those without truly opening it (the engine 
does less work with a stack when it doesn't actually open it) with 
something like this (off the top of my head, so maybe it'll need revision):

   on mouseUp
     answer file "Select the bad stack:"
     if it is empty then exit to top
     put it into tStackFile
     --
     repeat with i = 1 to the number of cards in stack tStackFile
       repeat with j = the number of images \
        of cd i of stack tStackFile down to 1
          delete img 1 of cd i of stack tStackFile
       end repeat
     end repeat
   end mouseUp



-- 
  Richard Gaskin
  Fourth World Media Corporation
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