SOF-PSERR
    PS_ERROR
    critical errors handler
    311,50

    Records critical information on errors (including internal and out of 
    memory) to your own customised log file. These include total and free 
    memory, program trace, open files, DOS MCB, current screen, hardware 
    config, data, time and memory variables (to memory file).  Functions 
    are included to tell you about your hardware - CPU(), EMSVALID(), 
    MONITOR(), STACKCHECK() and UNDERFLOW() help detect stack problems.