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ble_traceprintf required some library functions to be brought into the ROM and this did not fit in the available space. So we decided to remove this from 20736/7.
Ok understood, do you know other functions that are not part of SDK2.0 for space reason?
If someone is interested, here is a quick-and-dirty implementation of ble_traceprintf():
#define TRACE_TEXT_MAX 256
void ble_traceprintf(const char *fmt_str, ...)
va_start( arg, fmt_str );
vsnprintf(s, TRACE_TEXT_MAX, fmt_str, arg);
va_end( arg );