On Tue, May 26, 2009 at 9:41 AM, Carl Denk <cdenk@windstream.net> wrote:
>
> I have an 18F1320 with a C18 program and MPLAB (latest version). The
> program has been running fine for several years, and recently I wanted
> to add software averaging/filtering to the 3 ADC inputs, which included
> declaring 3 int extern arrays [10]. Apparently I was just under the
> maximum data locations. The memory gauge shows 1683/4096 program and
> 152/256 data before any changes. It would seem that 256 - 152 = 104
> would be sufficient, but even declaring one additional "int a[10]" array
> creates the ".udata_c018i.o' can not fit the section. Section
> '.udata_c018i.o' length=0x0000000a" error. I had been assuming that the
> memory usage gauge reflected the actual memory used, including those
> locations added by the compiling/assembling process, but after reviewing
> the map file, that does not appear to be the case. I thought the gauge
> info was generated at link time, and should include all the memory used.
> Is this a MPLAB error?
>

Can you post the relevant contents of the MAP file so we can see where
and how much data memory (RAM) is being used?

-Scott
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