hi, ive been compiling my program ok until i came across the following error

FATAL ERROR (IMP302)

The weird thing is that the code im putting in seems to be correct to my eye. To check this out i was first running it in the borland command line compiler for quickness. This is where i get the error. I put it into the borland c++ builder 6 program and i got no errors? this seems a bit random to me? Is it some sort of size related error that the command line version can only handle so many lines? Seems strange that my program has hit around the 30000 lines mark then got this error? I would appreciated anyones input

thanks