Steps I made:
1) I uninstalled full Adobe because I need this license for another computer.
2) I installed Adobe Reader X.
Problem:
1) Cannot open DDE link: Acroview Error
Every time I try to compile a PDF TeXify in WinEdt, I get the above error. The funny part is WinEdt still generate PDF file and I still can view it.
Solution:
1) Change the following line in “..\Winedt\exec\Acrobat OpenDoc.edt”
DDEOpen(‘%$(“AcroRead”)’,”acroview”,”control”); to DDEOpen(‘%$(“AcroRead”)’,”acroviewR10″,”control”);
2) Save the edt file and re-compile.
Life of A Researcher 
Gabriel said:
I don’t know what version of WinEdt the above comment refers to, but in my case, I had to also make the change in the “Acrobat OpenDoc-Find.edt” file. Changing merely the “Acrobat OpenDoc.edt” was not enough. Once I made the change in both places, the problem was gone.
I hope it helps.
anil said:
thanks very much, it worked 🙂
jimbo0914 said:
Thank you! Problem solved.
Sbo said:
Yes this works thank you.
Domo said:
If you are using adobe Adobe Reader XI you should change
DDEOpen(‘%$(“AcroRead”)’,”acroview”,”control”); to DDEOpen(‘%$(“AcroRead”)’,”acroviewR11″,”control”);
from “..\Winedt\exec\Acrobat OpenDoc.edt”
Luis Felipe Martins said:
In Adobe XI, it needs to be AcroViewA11 … DDE Name`s was modified by Adobe since ADOBE10