in …\Common\Minimal \comtest.c is the definition for the comm.buffer size as follows:
#define comBUFFER_LEN ( 24 ) /* ‘X’-‘A’+1 … */
OK, Richard mentioned, this demo is "not a optimized solution".
But it works. But only, if the buffersize is lower then 108 ?!
#define comBUFFER_LEN ( 108 ) /* or larger value */
it seems, as if the OS does not start ?!