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Saves the currently selected graph to a binary file. This can subsequently be restored using OpenGraph.
| SaveGraph [/version data-version] [/id graph-id] <filename> | 
| /id | Graph object id. If more than one graph is displayed, graph-id can be used to identify which graph is saved. If omitted the currently selected graph is used. All currently open graphs can be obtained from the function GetGraphObjects , using GetGraphObjects('graph') , while GetGraphTabs can be used to obtain the graph objects within a single window. | 
| /version | Ignored. Retained for backward compatibility | 
| filename | Path of file. | 
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