Turning off the Preview Pane (and Details Pane) in the Local Policy Group Editor didn't work for me, still got the error:
Start / Run / gpedit.msc
I disabled them anyway, though, because then you can see more in File Explorer.
I found the answer on this page:
https://forum.solidworks.com/thread/51794
I know this has been answered already, but there is another way to solve this.
1) rename your sldworks.exe to sldworks_orig.exe
2) double click on a soldiworks file (maybe a .sldprt). It should ask you to select a program. Go ahead and select your renamed file.
3) the file should now open without the error message.
4) rename sldworks_orig.exe back to sldworks.exe
5) repeat steps 2 & 3
You should be good. In short ... you're trying to fix the file type association.
This worked on several computers in my office today. Users where on Win 7 x64 with Solidworks 2011.
NOTE: if you right click on a file and say "OPEN with" and select solidworks and it opens without errors (as apposed to double clicking on a file and getting the send command error), the method I just listed should fix your problem.
Translated to ARTLink6:
1) Go to ... C: \ Program Files \ BERNINA \ ARTlink 6 \ BIN ... and rename your ARTLink.exe to ARTLink_orig.exe
or this works too (all one string): ARTLink.exe - With No DDE Error.exe
Kind of confusing: The ARTlink6 program, ARTlink.exe ... uses another name that opens the program: dsgnedit.exe, Wilcom Pty Ltd
2) double click on an .art file. It should ask you to select a program. Go ahead and select your renamed file.
3) the file should now open without the error message.
4) rename ARTLink_orig.exe back to ARTLink.exe . . . No - you get the error message again, leave it as is
5) repeat steps 2 & 3 . . . No
Control Panel \ Default Programs \ Associate a file type or protocol with a program \ Set Dsgnedit.exe as the Default Program for the other Artista file types:
.art
.art42
.art50
.art60