03100: blitz2k, sfrush, wg3hd, carnevil: DIFF CHD Error: Unsupported CHD Version

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
03100	Crash/Freeze	Critical (emulation)	Always	Apr 8, 2009, 01:35	Apr 8, 2009, 08:49

Tester	Endaar	View Status	Public	Platform	MAMEUI
Assigned To		Resolution	Unable to reproduce	OS	Windows XP/Vista 32-bit
Status [?]	Closed			Driver	midway/seattle.cpp
Version	0.130u2	Fixed in Version		Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	03100: blitz2k, sfrush, wg3hd, carnevil: DIFF CHD Error: Unsupported CHD Version
Description	All four of these games fail with the same error, before/during the ROM loading process. The ROMs verify OK, the CHDs have been upgraded to version 4 and pass chdman -verify. I've included sample output from CHDMAN for the carnevil CHD. I don't have a version 3 CHD any longer to test with, although I know blitz2k was working with my v3 CHD in the 129 series.
Steps To Reproduce	Load game.
Additional Information	F:\Program Files\Emulation\MAME\MAMEUI>chdman -verify roms\carnevil\carnevil.chd chdman - MAME Compressed Hunks of Data (CHD) manager 0.130u2 (Mar 29 2009) Input file: roms\carnevil\carnevil.chd SHA1 verification successful!8... F:\Program Files\Emulation\MAME\MAMEUI>chdman -info roms\carnevil\carnevil.chd chdman - MAME Compressed Hunks of Data (CHD) manager 0.130u2 (Mar 29 2009) Input file: roms\carnevil\carnevil.chd Header Size: 108 bytes File Version: 4 Flags: NO_PARENT, READ_ONLY Compression: zlib+ Hunk Size: 4096 bytes Total Hunks: 1052258 Logical size: 4,310,046,720 bytes SHA1: 5cffb0de63ad36eb01c5951bab04d3f8a9e23e16 Raw SHA1: ba32b7ef9721d730ce58bd753d47fb947b6ae9b6 Metadata: Tag='GDDD' Length=35 CYLS:524,HEADS:255,SECS:63,BPS:512.
Github Commit

Flags
Regression Version
Affected Sets / Systems	blitz2k, sfrush, wg3hd, carnevil

Attached Files

No.04159 john_iv Senior Tester Apr 8, 2009, 03:10	Non-repro here, all CHDs play fine in MameUI32/64 .130.2 Vista x64.
No.04160 etabeta Developer Apr 8, 2009, 04:13	Could it be related to this bit from 0.130u1 whatsnew? The first impact you will find is that all of your CHD differencing files are invalid. Just delete your "diff" directory contents entirely.
No.04162 Haze Senior Tester Apr 8, 2009, 07:49	yes, it will be because the diff folder (which stores any data the games attempt to write to the HD) has files in an older incompatible format.