On the machine where you say you cannot open the report...
Can you at least open it in design mode?
If you can design it but not preview it, check the printer driver on the machine having the trouble. If you don't have a printer defined, you cannot preview the report. This is because the preview function is WYSIWYG. If it cannot determine how to build the report data stream to the printer, it cannot build the report.
I ran into this once on an old system that didn't have a printer defined. Windows had just been "refreshed" and a lot of the registry settings were lost. The printer was one of them. Lo and behold, when I redefined the printer, reports started working.
And of course, using Tools>>References from a Code page shows you NOTHING about printers, so most folks don't think to look there. But that will have the symptoms you report. And it is easy to check. So if that isn't the problem, at least the test wasn't that painful to do.