This can occur on the first memory access instruction if the trace data has overflowed the trace buffer (not the FIFO buffer of the ETM). Memory access addresses are compressed by outputting only the low-order bits that differ from the previous memory address. Full addresses are output approximately every 1024 cycles, and when tracing is enabled or re-enabled. If the first memory access instruction in the buffer does not contain a full memory access address, this error occurs. Decompression of memory address data stops until a full memory address is found.