Warning L10

*** Warning L10

Cannot Determine Root Segment

While processing the input object modules, the linker determined that overlay analysis is required (this is typically the case with object modules created using the C51 or PL/M-51 Compilers). However, the linker was unable to determine the root segment (which is required for overlay analysis).

This is usually caused by a program with mixed C and assembly where:

• The original Keil startup code is not used,
• or the main C function is not used,
• or only C functions are used and called by a main assembly function.

Without changing the structure of the program, there are two solutions to this problem.

1. Use the NOOVERLAY directive to disable overlay analysis entirely.
2. Use the OVERLAY directive to create references between the appropriate program functions.