ERROR ... Too many files open

[CerpinTaxt]

Hi,

I'm using several of NASA's 21600px * 21600px BMNG maps as tiled exr for color, spec and displacement to render an earth. They render like a charm so far but sometimes the Maya GUI gets all messed up when dealing with the shading network inside the hypershade or node editor and the output windows is spammed with error messages like:

ERROR, imageIsFile, can't open `....earth_C1_wmask_tiled.exr'. Too many open files

After that you can't access most of the menus in maya and can't even save the scene. Is this a bug or am I asking for too much here? I have to admit that I used the default settings (64x64 tiles) in the img2tiledexr converter. Thats a lot of tiles.

I saw this as resolved in the release_notes.txt under V-Ray/Maya - 2.00 stable. We're using Maya 2013, Vray vray_adv_22501_maya2013_x64_22456 and Windows 7 professional 64bit. It should be fixed in our nightly build, no?

cheers,
jan

[vlado]

It's not the number of tiles, but the number of textures. The limit for open file handles for the Visual C++ CRT library (which in turn is used by the OpenEXR library) on Windows is 2048 (even though Windows itself can handle way more files). This limit can be avoided on Linux, but I don't know of any way to do that on Windows without (a minor) rewrite of the OpenEXR library.

Best regards,
Vlado