This feature is now depreciated. We recommend using channel persistence to maintain a history between restarts of DAQFactory. Currently channel persistence does not support spectral, image or string channels, so the Save with History feature provides an alternative and will remain until those channel types are supported.
The regular save methods do not save historical data of your channels. When you reload your document, the history for all your channels will be cleared out until new data is acquired. Since graphs use this historic data for display, the graphs will also clear out and will generate as new data arrives. If you wish to save historic data with your document, select File - Save with History or File -Save as with History. This will save all the settings that a normal Save would, plus the historic data for all the channels. Depending on your history sizes and the number of channels, this can make for a rather large file. Documents saved with history open the same way as normal documents. Once reopened, you will need to Save with History again if you wish to continue to save the document with newly acquired data.
Note: Both Save and Save with History will save non-calculated V. channel data to disk. See V.Channels for more detail.
Note: Opening a file saved with History does not update any output channels. The channels will have the same history from when they were saved, but the actual output I/O on the device is not updated with the last value in the history. You would need to manually do this from a start up sequence.
