Hello, I am trying to use the function "strtol" to convert hex-strings to longs (C166, version 3.12). I am including <stdlib.h> and <stdio.h>, but the linker complains "Error 140: 'strtol' undefined; assuming .... ". According to http://www.keil.com/support/docs/1685.htm , that function is implemented. What could be the problem? Thanks for any help! Holger