This method is called to open up an existing tracking data file for reading or a new one for writing. It must be implemented if you are trying to read tracking data. The newVal parameter contains the full name of the file to be opened or created. The newFile parameter is used to indicate whether the file should be opened (for reading) or created (for writing). If creating a new file, it should be done so so that data may be appended to it.
The plugin is responsible for keeping track of the resulting file pointer and sharing it with the other methods (notably GetObsSet and Reset) so that they may use it to perform the necessary tasks.
The plugin is responsible for storing the file name internally so that it may be returned by the FileName property.
- newVal
- newFile






