The _hist.mvw file is a HyperView session file.
This file is created when an optimization is performed. Creation of this file is controlled by the I/O option DESHIS.
This file is a HyperView session file and may be opened from the "File" pull-down menu in HyperView or HyperGraph. The file automatically creates individual plots for each of the results contained in the .hist file. Each plot occupies its own page within HyperView (HyperGraph).