When the history curve is opened, pacdisplay9.6 goes wrong

Hello everyone!
When the history curve is opened, the area is sometimes blank (no start time, no stop time, only file name). Then click this to open the file, and pacdisplay9.6 goes wrong. !
Every mistake is to open the latest file.

Why? Is there any solution to it?

z

Is it just me that I met this fault?

Please email support and let them know. Thanks.