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2010.02.09 14:54 "Re: TIFFOpen returns 0", by Kai Muehlbauer
Am 09.02.2010 14:56, schrieb Andrew Brooks: > On Tue, 09 Feb 2010 13:23:46 -0000, Kai Muehlbauer > <kai.muehlbauer@uni-bonn.de> wrote: >> If I execute my program >> on a shell, TIFFOpen returns 0 (cannot open). If I run or debug the >> program in the IDE (eclipse) everything runs fine. > > Have you tried running your program via "strace" or "truss" to see if > there is a difference in the parameters to, or the return values from, > the system calls made by the program/library ? I very much appreciate your helpful hint on strace. So it goes: It was no libtiff issue. With strace I found out that some code before TIFFOpen was eating up all file-descriptors (1024 in my case). The program tried to open all files (>5000) in a particular folder. Then, no descriptors were left for TIFFOpen. On the other machine, there were only 500 files in that folder. Maybe the IDE also controles the file-descriptors so that no errors were produced. After fixing the file-issue TIFFOpen behaves like a charm. What I've learned: Know your tools! Regards, Kai -- Kai Muehlbauer Meteorological Institute University of Bonn Auf dem Hügel 20 | +49 228 739084 D-53121 Bonn | kai.muehlbauer@uni-bonn.de