I'm using an assembler startup file like the one given in the C manual. When I compile and link the project I get a Warning 10, No Root segment. Apart from this, the linker doesn't make an overlay map (call tree). When I put comments before the segment declaration: ;?C_51STARTUP segment CODE ;RSEG ?C_51STARTUP everything is OK. I get no Warning #10 and the Overlay map is generated. Why is this? VIktor