Please try the following:
1) Create a new folder C:\Recover
2) Place just a single wallet.dat in the folder
3) Ensure both the folder and wallet.dat are readable and writeable
4) Run Gulden.exe -datadir=C:\Recover -salvagewallet -debug from the prompt
5) If it fails send me the debug.log
PyWallet gives me the following errorCouldn't open wallet.dat/main. Try quitting Bitcoin and running this again
Same problem;2015-10-29 10:05:46 Gulden version v1.5.2.0-f0e8ba6 (2015-10-10 12:42:24 -0400)
2015-10-29 10:05:46 Using OpenSSL version OpenSSL 1.0.1k 8 Jan 2015
2015-10-29 10:05:46 Using BerkeleyDB version Berkeley DB 4.8.30: (April 9, 2010)
2015-10-29 10:05:46 Default data directory C:\Users\AKKIE\AppData\Roaming\Gulden
2015-10-29 10:05:46 Using data directory N:\Gulden
2015-10-29 10:05:46 Using config file N:\Gulden\Gulden.conf
2015-10-29 10:05:46 Using at most 125 connections (2048 file descriptors available)
2015-10-29 10:05:46 Using 8 threads for script verification
2015-10-29 10:05:46 Using wallet wallet.dat
2015-10-29 10:05:46 init message: Verifying wallet...
2015-10-29 10:05:46 CDBEnv::Open: LogDir=N:\Gulden\database ErrorFile=N:\Gulden\db.log
2015-10-29 10:05:46 Failed to rename wallet.dat to wallet.1446113146.bak
2015-10-29 10:05:46 GUI: initializeResult : Initialization result: 0
2015-10-29 10:05:46 GUI: requestShutdown : Requesting shutdown
2015-10-29 10:05:46 GUI: shutdown : Running Shutdown in thread
2015-10-29 10:05:46 Shutdown: In progress...
2015-10-29 10:05:46 StopNode()
2015-10-29 10:05:46 Shutdown: done
2015-10-29 10:05:46 GUI: shutdown : Shutdown finished
2015-10-29 10:05:46 GUI: shutdownResult : Shutdown result: 1
2015-10-29 10:05:46 GUI: ~BitcoinApplication : Stopping thread
2015-10-29 10:05:46 GUI: ~BitcoinApplication : Stopped thread
Note : The wallet.dat files i recovered are much different then the one from the new wallet. I can recover all data from the new wallet.dat i created. It seems like the wallet.dat files are not right. The recovered files are build somewhere in 2014. Can it have something to do with the fact there are build in old outdated guldencoin wallets?
Edit :Older wallets giving the same problem
2015-10-29 10:16:07 Guldencoin version v1.3.1.0-unk-beta (Jan 7 2015, 23:42:14)
2015-10-29 10:16:07 Using OpenSSL version OpenSSL 1.0.1h 5 Jun 2014
2015-10-29 10:16:07 Default data directory C:\Users\AKKIE\AppData\Roaming\Guldencoin
2015-10-29 10:16:07 Using data directory N:\Gulden
2015-10-29 10:16:07 Using at most 125 connections (2048 file descriptors available)
2015-10-29 10:16:07 Using 8 threads for script verification
2015-10-29 10:16:07 init message: Portomonnee aan het controleren...
2015-10-29 10:16:07 dbenv.open LogDir=N:\Gulden\database ErrorFile=N:\Gulden\db.log
2015-10-29 10:16:07 Failed to rename wallet.dat to wallet.1446113767.bak
2015-10-29 10:16:07 Shutdown : In progress...
2015-10-29 10:16:07 StopNode()
2015-10-29 10:16:07 Flushed 0 addresses to peers.dat 0ms
2015-10-29 10:16:07 Shutdown : done