Hi and welcome to the forum!

The PIC12F675 only has 1k so it'll be impossible to fit a 4k program. However, it's not the size of the source file (ie the "text file" containing the program) that matters, it's the size of the compiled .hex file that you actually program into the PIC. I can't think that piece of code would result in more than 1k, not to mention 2k which you say is the limit of the free version (which version is that?).

Finally, IF l=600000 won't work because l is declared as a WORD (ie 16bits) so it can only hold values between 0 and 65535 and there's a missing THEN on the same line.

/Henrik.