Hello; I'm trying to open a mathcad file that I've been working on for 2 weeks, but today the file does not open. Can anyone please help me? Thanks!!

[lhernandez-2]

This is the displayed message:

The file type is not supported. Log file is located at C:\ProgramData\PTEc\MathcadPrime\Logs\MathcadPrime_Exception_20170610_125046.log

[Werner_E]

Whats the size of the byte if you look at its information with explorer? Does it happen to be 0 bytes?

Does the logfile gives any clue as to what was going on?

In case the file is not zero bytes in length - are you allowed to post it here?

If yes - post it here, if no, try renaming the file to the extension *.zip an see if you can open it with any zip archiver (WinRAR, 7Zip, Winzip, ....)

[RichardJ]

Unfortunately, based on past experience, the file is probably trashed. Mathcad 15 sometimes corrupts files, but more often then not is does so in a way that most of the file is recoverable. When Prime corrupts a file it often fills the entire file with NULL characters, so there's nothing to recover. If you can, post the file here.

[LucMeekes]

"If you can, post the file here."

That is: you post the Prime file (the one with extension .mcdx), not the .log file.

[PSuomela]

Hello!

Mathcad suddenly crashed with the file I last saved 1,5 h ago (not very well done, I know).

When I try to post you the file here, this appears:

 

The contents of the attachment doesn't match its file type.

Is there any way I could get the file recovered?

[MJG]

Put the Mathcad file in a compressed (zip) folder, then you can upload it.  This forum doesn't like Mathcad files to be uploaded directly.

[Werner_E]

As Richard already wrote, the chances to recover data from a damaged Prime file are very low.

You can attach mathcad files here only if you zip them first. Thats a bug in the settings of the forum software here and has nothing to do with the fact that your file is damaged.

[PSuomela]

Hi!

This is the compressed one. How does it look like?

[RichardJ]

Well, I have good news and bad news.

The good news (very good news, in fact), is that it's not just a pile of NULL characters. So most of the content is still there.

The bad news is that I do not know how to fix the file. This is the first corrupted Prime file I have seen that might actually be fixable, so it's a new problem for me.

[RichardJ]

It's interesting. which version of Prime are you using?

A .mcdx file is actually a zip file by another name. Change the extension to .zip, and you can uncompress it. What I have seen before when I have done that is a single XML file. In this case though, it unzips to an entire folder structure

Edit: I just created a test file in Prime 4.0, and uncompressed that. I get the same folder structure. So, based on that and the error message when I try to open your file, I think the problem may be no more than some corrupted header information.

[RichardJ]

Do you have active maintenance with PTC? If you do, they should be able to recover this file for you. 

[MJG]

Try this.  I don't have Prime 4 on my computer, so I can't check if it's working.

[LucMeekes]

Does not successfully open in my Prime 4 express.

That's a bad sign.

[LucMeekes]

The log file complained:

"Exception data:
File being opened: Esimerkkilaskelmat129-20170914_183533.mcdx
Schema validation exception: The 'precision' attribute is invalid - The value '' is invalid according to its datatype 'Union' - The value '' is not valid according to any of the memberTypes of the union."

So:

There was an offending parameter in the worksheet.xml file, a couple of times: precision=""

I've set each to: precision="1".

Try the attached file (after unzipping the .mcdx file out of it.)

Success!
Luc

[VladimirN]

Try to use "Mathcad Support Center": http://support.ptc.com/support/mathcad_supportCenterOpt.htm