The tst_iter test appears to be failing to compile or execute a small C program that I use. Below is that C program. See if you can compile it and execute it on your machine using commands something like this gcc ./iter.c -o iter.exe ./iter.exe >>iter.cdl substituting whatever your c compiler is for gcc. The program iter.c is as follows. #include <stdlib.h> #include <stdio.h> #define N (5*256*256) int main() { int i; for(i=0;i<N-1;i++) {printf("%d,\n",i);} printf("%d;\n}\n",N); return 0; } =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: DXI-367638 Department: Support netCDF Priority: High Status: Closed