Max size for Viewpoint..?

I wanted to try Viewpoint on a very wide file, instead of Photoshop…the picture is a tad over 41000 pixels wide and saved as tiff (16bit). I’m not using the latest version of Viewpoint, but Viewpoint didn’t refuse at the outset to open the file, but after “reading it” I got the message “file can not be opened”…no explanation why not. So…was file too large…? – …or was there something else…?
I’m on Mac running El Capitan for Viewpoint…

See
Everything you need to know about DxO ViewPoint 4 - DxO :

What image file formats are compatible with DxO ViewPoint 4

When used as a standalone application, or as a plugin for Adobe software, DxO ViewPoint handles JPG or TIFF files up to 200 Mb in size. However, when DxO ViewPoint is installed as an extension to DxO PhotoLab, where it appears as a dedicated palette on the Customize tab, it handles any RAW file format supported by DxO.

I would guess the limit applies to uncompressed size but I may be wrong.
Welcome to this forum.

OK, thanks – the file I tried was about one gigabyte, so much too big then. And I was using Viewpoint 1.2.2
(The adjustment I wanted to make was minimal and Photoshop’s “lens control” couldn’t do “minimal”…)
If I can ask one more question – I’m using PhotoLab 3 – what version of Viewpoint would “accompany” this, now outdated, version of PhotoLab…?

You can find such info hre:

I forgot I had posted “similar” before…about ViewPoint and file size…
Well, I got another “case” (the previous was a very wide panorama and I managed to manually solve challenge in Photoshop…) – I tried to correct another wide view in Viewpoint – wide, but not by far, as wide as the one I posted about before – this one is 17800 pixels wide…
When I try to open this image, it first shows up correctly, but after a second or two, a “banded” scrambled, “image” is all that shows on screen…so…nothing can be done…(and again, I had to do some extremely “delicate” maneuvering in Photoshop, which worked…)
So I was left wondering again – what was the reason for Viewpoint refusing to show image…? – It is Viewpoint 1 I am using – I have it installed on two computers and both behaved identically. – Is DxO deliberately crippling the software for some reason…? – I can’t believe that less than 20 000 pixels would be too wide…
Very grateful for insight on this problem…