Lee McLaren wrote :

> I am writing a program in C18 for the 18F1320 and keep running out 
of
> data memory, according to the "Memory Usage Gauge" in MPLAB 7.30 I 
am
> only using 138 out of 256 but every time I try to increase 
> the size of a serial buffer I get:...

It seems as the C18 stack is "eating" half of your mem :

> SHAREBANKS:
> 
> DATABANKS:
>  Memory  Start     End      Section 
>  ---------  ------     ---        ---------
>       gpr0  0x0080  0x00f3 .stack   


Maybe try to decrease the stack size (no idea how to do that).

Or, of course, rewrite your app or use a processor with
more RAM...

Jan-Erik.



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