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Saves the current group in binary format. Data groups can be opened with OpenGroup
| SaveGroup [/force] [/version version] [<filename>] | 
| /force | If is specified, any existing file will be overwritten. Otherwise the command will fail and display an error message | 
| /version | Ignored. Retained for backward compatibility. | 
| filename | Save to the filename . Data can later be restored with the command OpenGroup. If filename is not specified, a dialog box will be opened allowing the user to choose from available files. | 
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