First, remove the red part:

@echo off
hlcsg -wadinclude zhlt Lab
hlcsg Lab
hlbsp Lab
hlvis Lab
hlrad Lab
copy Lab.bsp "C:\Program Files\Valve\Steam\SteamApps\general_zim\counter-strike\cstrike\maps"
pause
"C:\Steam\Steam.exe" -applaunch 10 -dev +sv_cheats 1 +map Lab

You only want to run each step once, but you can add lots of options to each step.
For example, your hlrad line could look like:

hlrad -bounce 3 -extra -sparse -smooth 89 -chop 24 -texchop 16 Lab

That would be for an extremely high quality lighting compile. Might be a good idea for your final compile on an important map. But it takes FOREVER.

Anyways, check your log file for an earlier error in hlcsg. hlcsg is supposed to create your Lab.p0 file. So since it's not there, hlcsg must have had an error.

It's probably that it couldn't find any hulls to fill. That means you don't have any entities (like info_player_start) inside your map.

A hull is a pocket of open space surrounded by blocks. Kind of like the hull of a ship. hlcsg can only find hulls if you put entities in them.

Entities also include Brush Entities like func_ladder and trigger_'s.

Use Go To Brush Number... (Ctrl+Shift+G) to find a specific entity.