Try the solutions given below:
Solution 1)
(This error occurs when you have more than 1 process of Acrobat running)
1) Go to the task manager by pressing Ctrl+Alt+Del
2) Go to the processes in Task Manager
3) End all processes related to Acrobat
4) Launch Acrobat again.
Solution 2)
Open Acrobat navigate to Help menu & Repair the installation.
Solution 3)
Navigating to HKEY_CLASSES_ROOT\acrobat\shell\open\ddeexec\application and changing the Key "AcroviewA11" to "AcroviewR11.
Regards,
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