Can't Open Very Large PNG Created With MP

[brazenvoid]

I am joining comic strips in long format and any PNG exported bigger than 200MB (~300MP) can't be opened in XnviewMP. Though all other programs (Windows Photos, Firefox etc) can open it just fine.

MP just throws that File can't be loaded error.

PNG: Compression Level 9, no filter, keeps nothing
OS: Windows 10 64bit
XnView MP: v1.8.3 64bit

[xnview]

which pixel size?

[brazenvoid]

which pixel size?

720 x 440120
230 MB

[xnview]

Thanks to your detailed description I can reproduce the problem.

[brazenvoid]

Thanks for the fix!

[xnview]

This problem is supposed to be fixed in XnView MP 1.8.5. Please check and confirm the bug fix here.

[VictorVG]

I test use PNG image have size 12384x18432 px (228.262 Mpixels), 32 bit RGBA, 72 dpi Zip, compressed Zip (Deflate, 9) and w/o compression, Color system: GIMP built-in sRGB, make GIMP 2.10.38, file size 141 Mb and 872 Mb in to XnView MP v1.8.5 x64 - both test success.