This error messages occurs when D7e tries to open a data file that is not associated with an application , for example the tutorial swf files , if the swf file extension is not associated with any flash player application on your PC , D7e will display the operating system message on the command line window.
To fix this problem :
1- Install any flash player.
2- Download any swf file and right click the file , from the popup menu use the menu item (Open with) , browse your hard drive and select the appropriate application , remember to check the option [Always use the selected program to open this kind of file] , then press OK.
Return to D7e and it will work properly .
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