Windows 7 and Libreoffice 5.0.4.2, calc cannot read data from version 4.4.7.2

[gc]

version 5.0.4.2 able to open Calc files from version 4.4.7.2 but it is a blank worksheet

[AlexKemp]

It is possible that you are suffering from the OpenGL bug. The way to check, and how to fix, are explained in this reply to Q64314.