I came up with a strange error. This is Microsoft Excel 2007
When I click on a file (normal ending .xls) the execution should start Excel and then open the file. Instead I get an Error msg like this picture:
2015-10-15 17.18.02.jpg2015-10-15 17.20.42.jpg

The text in the small picture is translated into English as follows:
"An error occurred when the command was sent to the program" (Google trans)

The second picture is only to show that the extension is associated with Excel

I have no problem do manual opening the file. File/Open ....

The only problem is when I click on any Excel file and hope to open it.

Other programs from Office, like Word open file when clicking on the file !