Can't open .cwb. Error: "File is corrupt...Invalid audio format."

Error: "File is corrupt: [file path] Invalid audio format."

I created the file using PE7. Now, when I try to open it, that's the message I receive.
Is there a workaround that'll enable me to get this open?

Thanks slartabartfast

I appreciate the link. Yeah, it's the same sys. I just created it, deleted the project folder later, then tried to open the bundle and got that mesg. 

Still scratchin' my head.

Thx again,

Alysara

sadly, years ago, back when i was stupider, i used to save finished projects in .cwb and .bun only to find out later that by doing so i had killed them.  it sucks because i wanted to revisit a few of them only to find out that that was no longer an option.  does Cakewalk have a bundle disinfectant?

So sorry to hear if your misfortune. I hope you have a recent back up that you can fall back to and not loose too much time.

The bundle files are good storage medium. So is zip files. But I have been burned by both.

I had a song that I did many many hours of work on. I knew better than to rely on the bundle file. So I zipped it and burned it on a DVD. About a year later went to open it and......

Back up, then back that up, then back that up off site. Then make sure your back up is valid, and can be opened and used.

So sorry again.

I didn't know that Bundles would go corrupt. They worked fine up to Sonar4 from what everyone says in the forum. Maybe Cakewalk should of sent out a memo warning that Bundles are no longer stable. You would think the company would stand behind their product and backup system and had an update fix after the first user that lost everything. It seems it's never been addressed. They should remove the .CWB possibilty as a backup altogether.

I am researching sending my hard drive with the deleted project files to a data recovery business. However,  most don't recognize .cwp and .cwb as legitimate extensions used by windows. And they would have to be able to return the folders, including all the data, with timestamped audio, back to the original location.

The band is from different parts of the USA and the singer lives in Canada, so the horrific thought of re-tracking everything isn't even a possibility.

As a paid registered user with SONAR, still not a peep from anyone at SONAR TECH.

The Per Project Folders I still have for other artists and my own, I will backup by copying the entire folder, I will also save as OMF as this may be my final straw with ever using SONAR.
My client from this 14 song botched backup by SONAR, also a paid registered Sonar user said he will be using something other than SONAR from now on. And the threads on my Facebook Page have also caused many to be alarmed.

I do appreciate the sympathetic post on the issue.

Really good to read this and to know about precedence set in order to make the same mistake.  I tend to save files in bundled formats and it never occurred to me that could potentially corrupt the file.  Seems like this would show up on the Sonar radar.  I've got Sonar 7 and will not try this at home...or in the studio, in this case.  I've been curious about how reliable cloud storage is for the same reason.  What if????  Can never have enough back ups.

I had always saved as Bunfiles.
With this particular project  I saved Bunfile to my C drive.
I saved Bunfile to one of my external drives
I saved Bunfile to clients drive.
All project folders and data deleted from C Drive as we thought 3 copies of the Bundles
would be plenty safe backup. El-Wrongo
 
As a PAID REGISTERED Sonar customer, I still have not heard a peep back from Sonar Tech.
Great customer service eh?
 
So if nothing else, I hope others read this and use other methods like copying their Per Project Folders
to another drive and DO NOT USE BUNFILES.

from the cakewalk knowledge base-

Tips on Backing Up - Bundle Files

Backing up your Cakewalk files - The benefits of the Bundle
In the wonderful world of computers, backing up your work is more than a good idea. It's essential when you're using your computer for creative projects. Making backup copies of your Cakewalk files is quick, easy, and can save you some serious headaches, as well as hard drive space.
The preferred method for backing up files containing audio data is to save them as Cakewalk Bundle (.BUN) files. Here's how to do it in Cakewalk:

1. Choose File | Save As.
2. Change the Save As Type to Cakewalk Bundle.
3. Name the file.
4. Choose your saving location, and save the file.

Why use Bundle (.BUN) files rather than Project (.WRK) files for backing up?
First, a quick lesson: A Project (.WRK) file contains MIDI data, project-specific settings, and references to audio data that resides in the location specified by the current Data Directory (Options | Audio | Advanced). Backing up the .WRK file, or transferring the .WRK file from one machine to another, will NOT automatically backup or transfer the audio clip files referenced by that .WRK file. So saving or copying a .WRK file alone is not enough to safeguard your projects or transfer them to a different computer. 
The .WRK format is perfect for everyday Cakewalk use, and we don't suggest you save as a Bundle every time you save. However, once you've come to a point in a project where you've made significant progress and feel the need to back up the file, the Cakewalk Bundle comes into play.
The Bundle (.BUN) format preserves ALL data, audio and otherwise, in one file, which can then be moved to any location you like. Because of this, these files also tend to be quite large and slow to open. You'll need to save your Bundle files on your hard drive, or on some large capacity storage medium such as a CD or tape drive. Once that's done, you can delete the .WRK file version, then use the Clean Audio Disk command to remove the associated audio files (which you don't need because they're saved in the .BUN file now). This will free up space on your hard drive for your next project.
When you're ready to work with the project again, simply choose File | Open and navigate to the location of the Bundle file. The file will open with all data preserved just as you left it.

The above information refers to .wrk and .bun files.

What was the last Cakewalk Program to create those files. Certainly not the Sonar range.

If I was to have read that document as a resource I'd be questioning what those file formats have to do with Sonar.

All this talk about the failure of cwb files is a beat up. They are no more prone to corruption than any other file form. File corruption due to hard drive speed is pretty speculative and not supported by any evidence that I've been able to find.

The fact is that any file format can become corrupt. EVEn if I use a zip program to bundle some files I'll test it straight away to make sure that it decompressed properly. The same with Cakewalk bundle files.i know it terrible to lose work. Been there done too and it can be very expensive to recover data if that's even an option. A proper backup scheme is what's really required.

Cakewalk are usually very helpful with sorting out corrupt file problems.

I think the whole point of this thread is the OP was told with the upmost authority by Cakewalk  that using CWB ,BUN files was by far the best choice for back up. 
Sure all files formats can be corrupted, But there is no way to retrieve your audio data from a corrupted CWB file. There is from a corrupted CWP file. 
 
The Cakewalk data base needs to sorely be updated. 
 
It should also say 
We recommend you back up your work regularly. You can use CWB files but be warned all data will be lost if they are corrupted. So as a precaution please also back up using a combination of CWP and MIDI files as well.  

Yep. As I mentioned here or elsewhere: CW should publish a de-bundling software. They owe it to us - in a way.