Confusing Compiler Error

[UrsaMNet]

I'm sure this is simply due to inexperience, but I'm stuck!



MPLINK 3.40, Linker
Copyright (c) 2003 Microchip Technology Inc.
Error - section '.udata_user_routines.o' can not fit the section. Section '.udata_user_routines.o' length=0x00001f4e
Errors : 1

BUILD FAILED: Wed Oct 27 16:48:17 2004


What is wrong here? This isn't from a specific line of code (no line number). Is this the error received when you exceed your memory allocation?

Thank you!

[Max Lobovsky]

As far as I can tell from the C18 manual available from microchip, you are correct, you have exceeded the allowable size for the udata section which stores "udata – contains statically allocated uninitialized user variables." (Too many static (includes global) uninitialized (not given a value on declaration) variables in your user_routines.c/h files?). Read section 2.9.1 for more information about sections.

[Mark McLeod]

I'll backup Max on this one.

Although, it isn't due to your using up all of the available data space. The common reason for this (note the “.udata”) is that a data block is limited to 256 bytes. The total for global variables declared within a single MPLAB project file (e.g., user_routines.c/.h) cannot exceed 256 bytes. Use of “static” not withstanding.
It's a byproduct of how the linker allocates the available 256 byte blocks of data space.

P.S. Care to test what the declaration limit is per routine within a project file?
It's not 256.:)