Symbol Table Overflow

I am using a Pascal-based macro/programming language for an
image-analysis application (NIH Image).  I continue to receive an
error message when loading the macro "Symbol Table Overflow in Line 1
of Macro File".  What does this error mean exactly?  I'd appreciate
any help.  Please mail any replies to:

md...@cornell.edu

or, if necessary, respond to the message via the newsgroup.

Thanks in advance,

Matt Warfel