The original file was 38000x15000. I even tried with a cutoffs 30001x1 and 30000x1

Thanks Terry & Fred. I'll keep an eye on the thread.

Hi Jeff,
Almost all color ISO 100 in the market would easily get details on the 4000 dpi, (I'm familiar with Ektar 100, E100G, Provia, Velvia). The bottle neck is most likely to be in the lens, where low dispersion glass (like the apo-sironar-s series) can do the job.
For a 40"X100" print is not a big loss but at >60" wide I could use a lot of details left behind.
Thanks again,
Armando

Hello Terry,
Thanks for the quick reply.
Images are from a 4000dpi scan of 4x10s.
Memory is not an issue. I'm running x64 with 8gb so the info shows 2gb, 800mb, 2gb.
Qimage pro version 2010.207

Two images:
image#1 --> 30000 pixels wide
image#2 --> 30001 pixels wide (one extra pixel)

Both images are 1.X gb in size (<2GB) saved as TIFF 8bits, in PS CS5

Image#1 opens fine. Image#2 shows the typical "image read error".

Thanks again,
Armando

Hello,
I hope somebody here in the forum knows the answer.
Qimage was not able to open a 8bit tiff file 38000 pixels wide so I decided to crop it and save 2 files, with 30000 and 30001 pixels. The one with 30000 pixels opens fine but the one with 30001 pixel shows the typical "image read error" and fails to open.
I wonder if anybody has any experience with files above the 30000 limit.
Thanks,
Armando