Can VeraCrypt open an old TrueCrypt container?

I have a TrueCrypt container that was made some time in 2013. It's exactly 25MB and named secret.tc. I installed VeraCrypt 1.19 in macOS Sierra, but cannot seem to mount the container.

The error in the VeraCrypt GUI is:

Operation failed due to one or more of the following:

- Incorrect password.
- Incorrect Volume PIM number.
- Incorrect PRF (hash).
- Not a valid volume.

Looking through the --help I do seem to recognize the word nokernelcrypto, but not why. It's been quite a few years.

I have attempted both with and without TrueCrypt Mode enabled. Are there compatibility issues?

I can confirm Vera crypt won't open some of the containers created by True crypt. I've some containers from about 2005 and 2006, which I recently recovered from old CD backup discs, which failed to mount in Vera crypt (true crypt mode enabled) I tried for hours using variation of the password I may have used, always ended up in error. Today I have got a copy of true crypt v7 and installed it in windows xp virtual machine, and presto, works straight away!! So don't give up on your old TC volumes, just try with latest version of true crypt (7.1 I think was the latest).

I have had the same issue and just to re-confirm what others are saying - Veracrypt can sometimes fail in opening older TC volumes. To fix this just download an older version of TC and migrate to a compatible VC volume.

Edit: Just to clarify this should only be an issue you have a volume created with a version of TC <6. So if you created the volume with say v5 of TrueCrypt you would not be able to open that volume, and you should see a message like such:

You would have no problems to mount TrueCrypt container from VeraCrypt application - with or without the TrueCrypt check box checked.

So you problem is probably with entering an incorrect password or entering a PIM (you must not to enter it) or with the corrupted file (if you have a backup of it try it).

Just to distill the content here & provide my experience - yes - really old volumes of TrueCrypt CAN NOT be opened by VeraCrypt.

It it's important, get the last version of TrueCrypt (7.2), decrypt or mount those volumes in TrueCrypt, create a suitably sized & secure empty VeraCrypt volume, copy all your recovered TrueCrypt files into the new Veracrypt volume, and you are done.

Could there be problems? Perhaps, but I've done this with no problems with TrueCrypt volumes created over a decade ago. If you are worried about security breaches, sandbox the TrueCrypt & volume to decode into clear text, unistall TrueCrypt, create a suitable VeraCrypt volume, copy decoded cleartext you got from the old TrueCrypt volume, into the new VeraCrypt volume, delete both the clear text and the TC volume, & now you should be pretty much converted & good to go

Bottom line is if you have some really old TrueCrypt volumes you wold like to recover, your options are basically give up, or do the one time port with original TrueCrypt, import them into your new VeraCrypt volumes, then delete TrueCrypt & those volumes from your system. No guarantees, but that probably the most reasonable compromise if you ever want to see those old files again.

Oh, & PS - just for extra care, copy the .tc file you want to decrypt. If something goes terribly wrong & it gets corrupted, you still have the originaL.