Dump/Restore Causes Crash With No Error...

[Kimball Larsen]

I have traced this to an error 301 (Data File Error) in Valentina.

What causes this?  There are tons of reasons that file errors are  
raised.. is there any way to get more specific error information?

-- Kimball  



On Sunday, May 25, 2003, at 10:04 AM, Kimball Larsen wrote:

>
> On Sunday, May 25, 2003, at 02:41 AM, Ruslan Zasukhin wrote:
>
>> on 5/25/03 10:38 AM, Kimball Larsen at kimball at kimballlarsen.com  
>> wrote:
>>
>> Hi Kimball,
>>
>>> Heya folks.. I'm fairly new to Valentina and very new to this list..
>>> but I'm stuck, and hope someone can help.
>>> I have searched the list archives, but have not found a solution to  
>>> my
>>> problem.  Here's some background.  I want to have a utilities section
>>> in my application that includes buttons for both backing up the  
>>> current
>>> database and restoring a backup of a database.  I plan to use the xml
>>> format.  The backup/restore seems to work just fine (ie, I can backup
>>> to an xml file just fine, and the database restore function runs fine
>>> and does restore the database from the xml file.. ).  However -  
>>> after I
>>> do a restore, as soon as I do anything else in my app that requires  
>>> the
>>> database, the whole application quits, with no error message or  
>>> warning.
>>>
>>> Here is the code for my restore.  newDB is the existing global object
>>> that is of type VDatabase.
>>>
>>>  dim dumpFile, dbFile as folderItem
>>>  dim importedDB as VDatabase
>>>  dim res as boolean
>>>  newDB.close
>>>  //newDB = nil
>>>  dumpFile = getOpenFolderItem("????")
>>>  dbFile = getFolderItem("db.vdb")
>>>  dbFile.delete
>>>  importedDB = new VDatabase
>>>  importedDB.loadDump(dumpFile, dbFile, 2)
>>>  importedDB.close
>>>  importedDB = nil
>>>  //newDB = new vdb
>>>  dbFile = nil
>>>  //res = newDB.open(dbFile)
>>>  newDB.init("db.vdb")
>>>  msgbox ("Database Restore Complete.")
>>>
>>> As I said, the restore runs just fine, but it appears that there is
>>> some sort of a problem with newDB after the restore is done, because  
>>> as
>>> soon as I try to use it, the whole app crashes.
>>>
>>> Suggestions?  What am I doing wrong?
>>
>> I do not see obvious mistakes.
>>
>> On what line it crashes?
>
> I don't know what line it crashes on.. debugging does not show it...
>
>> What do NewDB.init() ?
>
> Here is the whole method:
>   dim f as folderItem
>   dim res as boolean
>   f = getFolderItem(dbName)
>   if(f.exists) then
>     res = self.open(f)
>     if res = false then
>       msgbox "Sorry, there was an error opening the patient database.   
> Error: 120"
>     end if
>     'success!
>     'msgbox "Database opened correctly"
>   else
>     msgBox "The patient database could not be found.  Now creating new  
> database."
>     f = getFolderItem(dbName)
>     if f<>nil then
>       res = self.create(f,1, 32*1024)
>       if res = false then
>         msgbox "Sorry, there was an error creating the patient  
> database.  Error: 121"
>       end if
>     end if
>   end if
>
>>
>>
>> Have you made steps in debugger to see if Db object is not nill ?
>>
>
> Yes.
>
>> Have you try set debugLevel = 2 for Valentina and watch console  
>> output ?
>> Try this, may be you will see some error code from Valentina.
>>
>
> I'll try this next.
>
>> It seems Erne, have utility that do XML dump/load.
>> Look into archive of V4RB/ThirdParty, it seems vExport project,
>>
>> Also project _TEST have it in one of tests.
>>
>
>
> I have reviewed both of these projects, and they work reasonably well,  
> but I want to restore a database that I currently have open in the  
> app.. so I have to close it, restore it, then reopen it.  Everything  
> works but the reopening part.  Both of these examples don't open the  
> freshly restored database.
>
> -- Kimball  
>
>
>> -- Best regards,
>> Ruslan Zasukhin      [ I feel the need...the need for speed ]
>> -------------------------------------------------------------
>> e-mail: ruslan at paradigmasoft.com
>> web: http://www.paradigmasoft.com
>>
>> To subscribe to the Valentina mail list go to:
>> http://lists.macserve.net/mailman/listinfo/valentina
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>>
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>>
>>
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