Hi Luis, please read a good book about C but I think the following helps you at the moment: file: test.c #include <stdio.h> void main (int argc, char* argv[]) { int i; printf("argc: %d\n",argc); for(i=0;i<argc;i++) printf("argv[%d]: %s\n",i,argv[i]); } compile and run in Posix Shell: shell/iX> c89 test.c -o blubb shell/iX> blubb aa 123 56 ggg argc: 5 argv[0]: blubb argv[1]: aa argv[2]: 123 argv[3]: 56 argv[4]: ggg shell/iX> 'Hope this helps you anyway... Holger Wiemann Hewlett Packard GmbH, Germany