Heap A contiguous block of memory can be set aside to be used as a "scratch pad" by the application program at run-time. Many applications and functions require the use of a heap. When a heap is required the developer must configure the heap inside the MPLAB® IDE X project.
Care should be taken when creating a heap. Memory used in the heap is unavailable for global variables or the stack. Making a heap larger than it needs to be may make it difficult for the linker to complete the memory allocation.
If you need to work with Microchip Support staff directly, you can submit a technical support case. Keep in mind that many questions can be answered through our self-help resources, so this may not be your speediest option.