debug loses calling function

hi there,

i already have a new problem that seam a little mystery, at least to me.

when I'm debugging my design i can follow the called functions in the debug window (see below).

5 process_action() receiving_msg.c:145 0x04003258

4 recv_msg() receiving_msg.c:60 0x04002ec0

3 comtask() http.c:161 0x04001a08

2 wstask() http.c:485 0x04002394

1 osstarttsk() os_cpu_a.s:268 0x0404090c c

but at some point the three functions I would return to last disappear.

2 process_action() receiving_msg.c:147 0x04003268

1 recv_msg() receiving_msg.c:60 0x04002ec0

the function "recv_msg()" will disappear sometime in the process as well. when i return through the other functions I'm getting as new last function <symbol is not available>.

2 process_action() receiving_msg.c:190 0x04003458

1 <symbol is not available> 0x00000000

at that point the program freezes.

the first disappearing happens at a strcpy(local char[], global struct.char[]) command. but if i use this command in the function called before "process_action()" it has no effect.

any ideas how i can prevent losing my calling history?

Thanks in advance.

rico