Now cant open old PDF files

I recently installed Acrobat Pro, now I cant open any of my old PDF files, ?? Any ideas - thanks

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Correct answer pwillener

When I got to: HKEY_CLASSES_ROOT\acrobat\shell\open\ddeexec\application – I found: ab Default Reg_SZ AcroViewA10 already

So I need another solution.

Looks like you learned quickly how to use regedit!

The value you found must me replaced by "AcroviewR10".

If you can replace the value manually, make a System Restore Point first, so that you can easily back it out if any mistake occurs.

But I have just checked: I do already have a registry script available: download, unzip, then run AcroviewR10.reg from https://files.acrobat.com/a/preview/a0e543cd-3e8b-4f4b-81db-3310cd7560fe

Legend

What is your operating system? Acrobat version?

What exactly means "cant" - do you get any error messages?

Participating Frequently

Hi Pat – I cannot open my old PDF files.

I get message - Failed to connect to a DDE sever – Fatal Error.

On Windows 7 – 64 bit.

I have Adobe Reader 11 & Adobe Acrobat XI Pro (just installed)

Regards Maureen

Participating Frequently

Do you know how to use regedit? If so, try the following:

Key HKEY_CLASSES_ROOT\acrobat\shell\open\ddeexec\application

change the default value from "AcroviewA10" to "AcroviewR10".

If you are not sure about regedit, let me know, and I'll make a script for you.

When I got to: HKEY_CLASSES_ROOT\acrobat\shell\open\ddeexec\application – I found: ab Default Reg_SZ AcroViewA10 already

So I need another solution.

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