"invalid PID checksum" when using mobidedrm, even though it IS valid. - Page 5

wallcraft · 02-18-2009, 06:53 PM

Quote:

Originally Posted by Jean

I was trying to use the script shown in post #11

See pid_checksum.py.

pilotbob · 02-18-2009, 07:30 PM

Quote:

Originally Posted by Jean

IndentationError: unexpected indent

could someone please explain what the possible problem could be? Thanks.

Jean

Where did you get the script from. White space (tabs and such) is significant in Python. So, if maybe you cut and paste this from somewhere it might have been wrapping text and you didn't get the full lines.

BOb

Jean · 02-20-2009, 02:55 PM

I tried the pid_checksum.py script and it resulted in different checksum's than what I had been using for both my Kindle PID and my PC's PID.

Unfortunately I still get an error message -- "Error: invalid PID checksum".
I am thinking though that perhaps the book I am trying to de-drm has no drm to begin with. Would that give me an error message? At this point I am thinking of making a new purchase of a book I know has DRM included and retrying it.

I aslo tried using mobidedrm on a .pdb file but it didn't work - does mobidedrm work on .pdb files?

Pilotbob - I got the script from post #11 (page 1) of this thread posted by Red Dragon.
I copied it to notepad and renamed it as a .py script and saved it to my Python25 directory. When I tried to run it (from the command window while in the Python 25 directory) I recieved the 'unexpected indent' error. I don't know anythihg about python scripting so I don't know what the problem is.

Thanks for the assistance.

Jean

pilotbob · 02-20-2009, 02:59 PM

Quote:

Originally Posted by Jean

Pilotbob - I got the script from post #11 (page 1) of this thread posted by Red Dragon.
Thanks for the assistance.

Jean

you didn't get the mobidedrm script from here... that's what I meant.

BtW: You don't have to buy something to test this. Both fictionwise and booksonboard have free test ebooks each each format.

Can you read the book in Stanza or calibre as it is? If so, there is no DRM on it.

BOb

wallcraft · 02-20-2009, 07:20 PM

Quote:

Originally Posted by Jean

Unfortunately I still get an error message -- "Error: invalid PID checksum".

The usual reason for this is spaces in the filenames, for example the command:

Code:

pid_checksum file name1.prc file name2.prc XXXPIDXXXX

has 5 arguments and its 3rd argument is file. The pid_checksum script will detect that you are using 5 arguments by mistake, but mobidedrm just tells you that the PID checksum is wrong. The fix is to use quotes:

Code:

pid_checksum "file name1.prc" "file name2.prc" XXXPIDXXXX

wallcraft · 02-21-2009, 02:15 PM

Quote:

Originally Posted by Jean

I tried the pid_checksum.py script and it resulted in different checksum's than what I had been using for both my Kindle PID and my PC's PID.

Forget my previous post. I now think this means that the PIDs have typos, check for 1 vs I and 0 vs O.

wolfsi · 02-21-2009, 11:38 PM

I didn't read all the posts but I found out that all letters in the PID have to be in upper case. That what helped me after a few error messages.

wolfsi

Jean · 02-23-2009, 06:11 PM

OK - I tried again to use mobidedrm on one of my .prc files using capital letters in the PID.
This time instead of getting an invalid PID checksum error I now get an 'invalid file format' error.

From within the Python25 prompt in the command window I am typing:
mobidedrm.py inputfile.prc outputfile.mobi PID

There are no spaces in my file names and the mobidedrm.py file and my .prc file are located in the Python25 directory. Does anyone have any suggestions or thoughts on what the problem may be? Thanks again for all the assistance.

Jean

Marysart · 03-10-2009, 04:59 AM

Quote:

From within the Python25 prompt in the command window I am typing:
mobidedrm.py inputfile.prc outputfile.mobi PID

There are no spaces in my file names and the mobidedrm.py file and my .prc file are located in the Python25 directory. Does anyone have any suggestions or thoughts on what the problem may be? Thanks again for all the assistance.

Jean

I think both input and outputfile need to be .prc

mrgiedrnkr · 03-11-2009, 11:15 AM

I use a .prc infile and a .mobi outfile as well. However, I have to put my PID in double quotes. Then, it works great.
Stacy

tubamann · 04-15-2009, 01:43 AM

Thank you mrgiedrnkr, that's what I had to do as well

Reddevil · 05-24-2009, 04:58 AM

Just as a side note - I couldn't get mobidedrm to work unless I renamed my input .prc file from the original mobipocket name (something stupid like 92032322_90232322.prc) to a short name like dummies.prc.

I suspect the underscore in the name causes some sort of parse error when the script is being executed.

I must have messed around with mobidedrm for a good 2 hours banging my head against a wall since I knew my PID was exactly what was in mobipocket reader and PIDchecksum said the same thing but it still wouldn't work.

Renamed the file and it worked first shot. I didn't need to put my PID in quotes either.

delphidb96 · 05-24-2009, 05:05 PM

Quote:

Originally Posted by Reddevil

Just as a side note - I couldn't get mobidedrm to work unless I renamed my input .prc file from the original mobipocket name (something stupid like 92032322_90232322.prc) to a short name like dummies.prc.

I suspect the underscore in the name causes some sort of parse error when the script is being executed.

I must have messed around with mobidedrm for a good 2 hours banging my head against a wall since I knew my PID was exactly what was in mobipocket reader and PIDchecksum said the same thing but it still wouldn't work.

Renamed the file and it worked first shot. I didn't need to put my PID in quotes either.

Just so you know. SOME of those file names have TWO underscores in a row and, depending upon which font your computer uses to display filenames, this may not be obvious. Yep. Those 'double-underscore' names have tripped me up more than once - until I started using the 'Rename' option to grab the filename to the clipboard...

Derek

kevindorsey · 06-22-2009, 12:12 PM

Quote:

Originally Posted by delphidb96

Just so you know. SOME of those file names have TWO underscores in a row and, depending upon which font your computer uses to display filenames, this may not be obvious. Yep. Those 'double-underscore' names have tripped me up more than once - until I started using the 'Rename' option to grab the filename to the clipboard...

Derek

LMAO. Nice way to finish the thread.

mindwarp · 07-06-2009, 08:04 PM

I've been having this same problem. I can't for the life of me figure out what I'm doing wrong. But I continue to get Invalid PID Checksum.
I have a Macbook and a Ipod Touch and am using Iphone Backup extractor to get my Kindle files.
I got my UDID from Itunes and then used kindlepid.py to get my Mobipocket PID
I have python and wxpython installed and working. I've used mobidedrm 01, 02 and 05 and nothing seems to work.
I've tried all the suggestions of quoting my PID, making sure its capitalized, renaming the .prc ebook and so on.

This is what continues to come up:
macbook:ebook home$ python mobidedrm005.py ebook.prc output.prc 'PID'
MobiDeDrm v0.05. Copyright (c) 2008 The Dark Reverser
Error: invalid PID checksum

Any ideas on how I can go about figuring this out? Is it possible my PID is wrong?

Thanks so much!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
"dx" is not a valid search keyword	sushovande	Feedback	6	08-15-2010 09:20 PM
PRS-600 "Internal content invalid. Formatting" 600 crash (is it dead ?)	zelda_pinwheel	Sony Reader	93	02-18-2010 05:27 PM
Classic "Invalid Update"	shrktank	Barnes & Noble NOOK	4	02-14-2010 06:58 PM
Error help: "Invalid input object: NoneType"	MichaelGray	ePub	1	02-14-2010 09:16 AM
Error message : "Invalid Format" " Do you want to format your internal memory"	narbeauchamp	Sony Reader	11	07-22-2009 12:39 PM

02-20-2009, 02:55 PM	#63
Jean Zealot Posts: 101 Karma: 1069296 Join Date: Dec 2007 Location: Washington State Device: palm tx / Kindle 1 / ebookwise 1150 / Kindle Fire / Kindle Paperwhite	I tried the pid_checksum.py script and it resulted in different checksum's than what I had been using for both my Kindle PID and my PC's PID. Unfortunately I still get an error message -- "Error: invalid PID checksum". I am thinking though that perhaps the book I am trying to de-drm has no drm to begin with. Would that give me an error message? At this point I am thinking of making a new purchase of a book I know has DRM included and retrying it. I aslo tried using mobidedrm on a .pdb file but it didn't work - does mobidedrm work on .pdb files? Pilotbob - I got the script from post #11 (page 1) of this thread posted by Red Dragon. I copied it to notepad and renamed it as a .py script and saved it to my Python25 directory. When I tried to run it (from the command window while in the Python 25 directory) I recieved the 'unexpected indent' error. I don't know anythihg about python scripting so I don't know what the problem is. Thanks for the assistance. Jean

02-21-2009, 11:38 PM	#67
wolfsi Junior Member Posts: 4 Karma: 10 Join Date: Jan 2009 Location: Goodyear, Arizona Device: Sony PSR 505	I didn't read all the posts but I found out that all letters in the PID have to be in upper case. That what helped me after a few error messages. wolfsi

02-23-2009, 06:11 PM	#68
Jean Zealot Posts: 101 Karma: 1069296 Join Date: Dec 2007 Location: Washington State Device: palm tx / Kindle 1 / ebookwise 1150 / Kindle Fire / Kindle Paperwhite	OK - I tried again to use mobidedrm on one of my .prc files using capital letters in the PID. This time instead of getting an invalid PID checksum error I now get an 'invalid file format' error. From within the Python25 prompt in the command window I am typing: mobidedrm.py inputfile.prc outputfile.mobi PID There are no spaces in my file names and the mobidedrm.py file and my .prc file are located in the Python25 directory. Does anyone have any suggestions or thoughts on what the problem may be? Thanks again for all the assistance. Jean

03-11-2009, 11:15 AM	#70
mrgiedrnkr Enthusiast Posts: 26 Karma: 42 Join Date: Dec 2008 Device: Sony PRS-505	I use a .prc infile and a .mobi outfile as well. However, I have to put my PID in double quotes. Then, it works great. Stacy

04-15-2009, 01:43 AM	#71
tubamann Junior Member Posts: 1 Karma: 10 Join Date: Sep 2008 Device: Soon-to-be PRS-505	Thank you mrgiedrnkr, that's what I had to do as well

05-24-2009, 04:58 AM	#72
Reddevil Junior Member Posts: 3 Karma: 10 Join Date: May 2009 Device: Sony PRS-505 Silver (ordered... waiting to arrive!)	Just as a side note - I couldn't get mobidedrm to work unless I renamed my input .prc file from the original mobipocket name (something stupid like 92032322_90232322.prc) to a short name like dummies.prc. I suspect the underscore in the name causes some sort of parse error when the script is being executed. I must have messed around with mobidedrm for a good 2 hours banging my head against a wall since I knew my PID was exactly what was in mobipocket reader and PIDchecksum said the same thing but it still wouldn't work. Renamed the file and it worked first shot. I didn't need to put my PID in quotes either.

07-06-2009, 08:04 PM	#75
mindwarp Zealot Posts: 139 Karma: 3414358 Join Date: Dec 2008 Device: Kindle Fire	I've been having this same problem. I can't for the life of me figure out what I'm doing wrong. But I continue to get Invalid PID Checksum. I have a Macbook and a Ipod Touch and am using Iphone Backup extractor to get my Kindle files. I got my UDID from Itunes and then used kindlepid.py to get my Mobipocket PID I have python and wxpython installed and working. I've used mobidedrm 01, 02 and 05 and nothing seems to work. I've tried all the suggestions of quoting my PID, making sure its capitalized, renaming the .prc ebook and so on. This is what continues to come up: macbook:ebook home$ python mobidedrm005.py ebook.prc output.prc 'PID' MobiDeDrm v0.05. Copyright (c) 2008 The Dark Reverser Error: invalid PID checksum Any ideas on how I can go about figuring this out? Is it possible my PID is wrong? Thanks so much!

Advert

Advert