There is nothing I can do that you can’t do.
But 7 GB is too big to be an old WAV file. Or could it be a RF64 bit?
What do you know about the origin of that file?
I quickly checked your file, and for sure the header is corrupted, as there is no RF64 tag in the header for such a large file.
What settings did you use to make it “almost work” ?
Maybe it is a limitation due to 32 bit file size restriction of the file format, which is 4 GiB per file ?!
When I do some calculations with your given time values, Wavelab opens about 56.7% or your file. Compared with your given full file size of about 7 GB restricted to 4 GB, we get about 57.1%. Seems pretty close…
Also - assuming it is a file with 2 channels, 16 bit per channel and 44100 Hz samplerate - a file with a length of 6h 41min (24060 seconds) would result in a WAV file with about 3.95 GiB.
Can you play the file with a media player on your computer? And can you play past the 6h 41min mark?
Edit: I just read a bit about the RF64 tag PG1 mentioned. Seems like this would allow a file size greater than 4 GiB. But I guess that doesn’t help when the file is not saved as such.
Do you still have access to the original file? Maybe you can check the save settings again or even split the file to at least 2 smaller files.