Reported IrfanView 64 bit HDR format

[Seven]

Windows 7 64
IrfanView 4.51 64
When I open any .hdr file, I get an error: Decode error! Not a valid HDR file.

[Bhikkhu Pesala]

From the IrfanView Site:

• Advantages of IrfanView 32-bit over 64-bit version:
• Runs on a 32-bit and 64-bit Windows
• Loads all files/images for normal needs (max. RAM size is about 1.3 GB)
• Needs less disc space
• All PlugIns will work: not all PlugIns are ported (yet) to 64-bit (like OCR) and some 32-bit PlugIns must be still used in the 64-bit version, some with limitations (see the "Plugins32" folder)
• Some old 32-bit PlugIns (like RIOT and Adobe 8BF PlugIn) work only in compatibilty mode in IrfanView-64
• Command line options for scanning (/scan etc.) work only in 32-bit (because no 64-bit TWAIN drivers)

I created an HDR file using Serif PhotoPlus. I get the error in 64-bit IrfanView, but not in 32-bit IrfanView.

According to i_plugins.txt, support for HDR is provided by Formats.dll. The version in the Program Files plugins folder is a lot bigger than the one in the 32-bit Program Files (86) plugins folder. It seems that bigger is not better in this case.

When opened in 32-bit IrfanView, my HDR file is very dark and requires gamma correction.