Adobe reader failing to open

[Aksarben24]

I have been using AOL for a long time. I have Adobe Reader. Previously whe I received a .pdf file as an attachment in AOL, I would click on it and Adobe Reader would automatically open it for me. This does not happen anymore.

[Aksarben24]

I get the following message: Failing to connect to  a DDE SERVER.

[Amal.]

Hi Aksarben,

Apologies for the trouble caused and the delay in response, as described above you are getting the error: "Failing to connect to a DDE Server" correct?

We need some more information for a better understanding:

• What is the version of the application? To check the version of the application you may refer to - Identify the product and its version for Acrobat and Reader DC ​
• What is the OS and version?
• Are you on a home network or on a work domain?
• Is it with a particular file or with any file that you try to open?
• If it is with a particular file, could you please share the file with us through private message for testing? To know more about how to send a private message you refer to the link - How Do I Send  Private Message | Adobe Community
• Are you able to open the PDF file stored locally on your computer?

In the meantime, you may try the following troubleshooting steps:

• Try to download the file on your computer and try to open it.
• Please try to update the application to the latest version. Go to Help > Check for Updates. To know more about the latest version available you may please refer to the link - DC Release Notes — Release Notes for Acrobat DC Products
• https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.htmlPlease try to repair the installation (Windows only). Go to Help > Repair Installation.
• Check for any anti-virus program installed on your computer, if yes please disable the program.
• Reboot the system and check.

You may also refer to the help article in the link - Fatal error - Acrobat failed to connect to a DDE server

Let us know if you need more help.

Regards,

Amal