Appendix A. Error messages.

procNULL : Illegal object proc call

Improper call of the user-defined procedure was made. For example no paint procedure was defined for PERM Object.

object::Save: Not enough far heap memory

There is not enough heap memory for saving underlying images.

Graph::ShowHistogram : X-scale cannot be LOG for histogram

If x-axis was set to LOG mode, program interrupts when calling ShowHistogram.